55574531 has 4 divisors (see below), whose sum is σ = 55854000. Its totient is φ = 55295064.

The previous prime is 55574507. The next prime is 55574567. The reversal of 55574531 is 13547555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55574531 is a prime.

It is a super-2 number, since 2×55574531² = 6177056991739922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55574491 and 55574500.

It is not an unprimeable number, because it can be changed into a prime (55574591) 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, 139436 + ... + 139833.

It is an arithmetic number, because the mean of its divisors is an integer number (13963500).

Almost surely, 2^55574531 is an apocalyptic number.

55574531 is a deficient number, since it is larger than the sum of its proper divisors (279469).

55574531 is a wasteful number, since it uses less digits than its factorization.

55574531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279468.

The product of its digits is 52500, while the sum is 35.

The square root of 55574531 is about 7454.8327278350. The cubic root of 55574531 is about 381.6148521623.

The spelling of 55574531 in words is "fifty-five million, five hundred seventy-four thousand, five hundred thirty-one".