55608731 has 2 divisors, whose sum is σ = 55608732. Its totient is φ = 55608730.

The previous prime is 55608671. The next prime is 55608767. The reversal of 55608731 is 13780655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55608731 - 2⁶ = 55608667 is a prime.

It is a super-2 number, since 2×55608731² = 6184661926860722, 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 = 55608691 and 55608700.

It is not a weakly prime, because it can be changed into another prime (55608781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27804365 + 27804366.

It is an arithmetic number, because the mean of its divisors is an integer number (27804366).

Almost surely, 2^55608731 is an apocalyptic number.

55608731 is a deficient number, since it is larger than the sum of its proper divisors (1).

55608731 is an equidigital number, since it uses as much as digits as its factorization.

55608731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 55608731 is about 7457.1261890892. The cubic root of 55608731 is about 381.6931167404.

The spelling of 55608731 in words is "fifty-five million, six hundred eight thousand, seven hundred thirty-one".