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31086053 = 91134123
BaseRepresentation
bin111011010010…
…1010111100101
32011111100001022
41312211113211
530424223203
63030140525
7525140615
oct166452745
964440038
1031086053
1116602459
12a4b1745
13659541b
1441b2a45
152ae0a38
hex1da55e5

31086053 has 4 divisors (see below), whose sum is σ = 31121088. Its totient is φ = 31051020.

The previous prime is 31086049. The next prime is 31086079. The reversal of 31086053 is 35068013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35068013 = 109132143.

It is a cyclic number.

It is not a de Polignac number, because 31086053 - 22 = 31086049 is a prime.

It is a super-2 number, since 2×310860532 = 1932685382237618, which 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 (31086023) 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, 16151 + ... + 17972.

It is an arithmetic number, because the mean of its divisors is an integer number (7780272).

Almost surely, 231086053 is an apocalyptic number.

It is an amenable number.

31086053 is a deficient number, since it is larger than the sum of its proper divisors (35035).

31086053 is an equidigital number, since it uses as much as digits as its factorization.

31086053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35034.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 31086053 is about 5575.4867948906. The cubic root of 31086053 is about 314.4284689833.

The spelling of 31086053 in words is "thirty-one million, eighty-six thousand, fifty-three".

Divisors: 1 911 34123 31086053