55869731 has 2 divisors, whose sum is σ = 55869732. Its totient is φ = 55869730.

The previous prime is 55869727. The next prime is 55869739. The reversal of 55869731 is 13796855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55869731 - 2² = 55869727 is a prime.

It is a super-2 number, since 2×55869731² = 6242853684024722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55869739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27934865 + 27934866.

It is an arithmetic number, because the mean of its divisors is an integer number (27934866).

Almost surely, 2^55869731 is an apocalyptic number.

55869731 is a deficient number, since it is larger than the sum of its proper divisors (1).

55869731 is an equidigital number, since it uses as much as digits as its factorization.

55869731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 55869731 is about 7474.6057421111. The cubic root of 55869731 is about 382.2893447553.

The spelling of 55869731 in words is "fifty-five million, eight hundred sixty-nine thousand, seven hundred thirty-one".