55910731 has 2 divisors, whose sum is σ = 55910732. Its totient is φ = 55910730.

The previous prime is 55910717. The next prime is 55910747. The reversal of 55910731 is 13701955.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55910731 is a prime.

It is a super-2 number, since 2×55910731² = 6252019681908722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55910693 and 55910702.

It is not a weakly prime, because it can be changed into another prime (55910791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27955365 + 27955366.

It is an arithmetic number, because the mean of its divisors is an integer number (27955366).

Almost surely, 2^55910731 is an apocalyptic number.

55910731 is a deficient number, since it is larger than the sum of its proper divisors (1).

55910731 is an equidigital number, since it uses as much as digits as its factorization.

55910731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 55910731 is about 7477.3478586996. The cubic root of 55910731 is about 382.3828362299.

The spelling of 55910731 in words is "fifty-five million, nine hundred ten thousand, seven hundred thirty-one".