55757431 has 4 divisors (see below), whose sum is σ = 56809512. Its totient is φ = 54705352.

The previous prime is 55757413. The next prime is 55757441. The reversal of 55757431 is 13475755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13475755 = 5 ⋅2695151.

It is a cyclic number.

It is not a de Polignac number, because 55757431 - 2⁹ = 55756919 is a prime.

It is a super-2 number, since 2×55757431² = 6217782223439522, 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 (55757441) 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, 525961 + ... + 526066.

It is an arithmetic number, because the mean of its divisors is an integer number (14202378).

Almost surely, 2^55757431 is an apocalyptic number.

55757431 is a deficient number, since it is larger than the sum of its proper divisors (1052081).

55757431 is a wasteful number, since it uses less digits than its factorization.

55757431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052080.

The product of its digits is 73500, while the sum is 37.

The square root of 55757431 is about 7467.0898615190. The cubic root of 55757431 is about 382.0330348888.

The spelling of 55757431 in words is "fifty-five million, seven hundred fifty-seven thousand, four hundred thirty-one".