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54102211231 = 353915287429
BaseRepresentation
bin110010011000101111…
…100011101010011111
312011122110212002112011
4302120233203222133
51341300131224411
640504302052051
73623463131155
oct623057435237
9164573762464
1054102211231
1120a43319072
12a59a87a027
1351428ca553
14289348d3d5
151619aa9c21
hexc98be3a9f

54102211231 has 4 divisors (see below), whose sum is σ = 54117502200. Its totient is φ = 54086920264.

The previous prime is 54102211217. The next prime is 54102211259. The reversal of 54102211231 is 13211220145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13211220145 = 52642244029.

It is a cyclic number.

It is not a de Polignac number, because 54102211231 - 27 = 54102211103 is a prime.

It is a super-2 number, since 2×541022112312 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54102211291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7640176 + ... + 7647253.

It is an arithmetic number, because the mean of its divisors is an integer number (13529375550).

Almost surely, 254102211231 is an apocalyptic number.

54102211231 is a deficient number, since it is larger than the sum of its proper divisors (15290969).

54102211231 is a wasteful number, since it uses less digits than its factorization.

54102211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15290968.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 54102211231 its reverse (13211220145), we get a palindrome (67313431376).

The spelling of 54102211231 in words is "fifty-four billion, one hundred two million, two hundred eleven thousand, two hundred thirty-one".

Divisors: 1 3539 15287429 54102211231