55923731 has 4 divisors (see below), whose sum is σ = 56326200. Its totient is φ = 55521264.

The previous prime is 55923697. The next prime is 55923733. The reversal of 55923731 is 13732955.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55923731 - 2¹⁴ = 55907347 is a prime.

It is a super-2 number, since 2×55923731² = 6254927377920722, 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 = 55923691 and 55923700.

It is not an unprimeable number, because it can be changed into a prime (55923733) 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, 201026 + ... + 201303.

It is an arithmetic number, because the mean of its divisors is an integer number (14081550).

Almost surely, 2^55923731 is an apocalyptic number.

55923731 is a deficient number, since it is larger than the sum of its proper divisors (402469).

55923731 is a wasteful number, since it uses less digits than its factorization.

55923731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402468.

The product of its digits is 28350, while the sum is 35.

The square root of 55923731 is about 7478.2171003522. The cubic root of 55923731 is about 382.4124703243.

The spelling of 55923731 in words is "fifty-five million, nine hundred twenty-three thousand, seven hundred thirty-one".