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57554431 = 118958789
BaseRepresentation
bin1101101110001…
…1010111111111
311000022001211121
43123203113333
5104213220211
65413331411
71266130114
oct333432777
9130261747
1057554431
112a540550
1217336b67
13bc01a9c
14790290b
1550bd271
hex36e35ff

57554431 has 8 divisors (see below), whose sum is σ = 63493200. Its totient is φ = 51733440.

The previous prime is 57554429. The next prime is 57554459. The reversal of 57554431 is 13445575.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57554431 - 21 = 57554429 is a prime.

It is a super-2 number, since 2×575544312 = 6625025055467522, 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 (57554411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28416 + ... + 30373.

It is an arithmetic number, because the mean of its divisors is an integer number (7936650).

Almost surely, 257554431 is an apocalyptic number.

57554431 is a deficient number, since it is larger than the sum of its proper divisors (5938769).

57554431 is a wasteful number, since it uses less digits than its factorization.

57554431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58889.

The product of its digits is 42000, while the sum is 34.

The square root of 57554431 is about 7586.4636689303. The cubic root of 57554431 is about 386.0938834878.

It can be divided in two parts, 575544 and 31, that added together give a palindrome (575575).

The spelling of 57554431 in words is "fifty-seven million, five hundred fifty-four thousand, four hundred thirty-one".

Divisors: 1 11 89 979 58789 646679 5232221 57554431