55231751 has 2 divisors, whose sum is σ = 55231752. Its totient is φ = 55231750.

The previous prime is 55231741. The next prime is 55231783. The reversal of 55231751 is 15713255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55231751 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55231711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27615875 + 27615876.

It is an arithmetic number, because the mean of its divisors is an integer number (27615876).

Almost surely, 2^55231751 is an apocalyptic number.

55231751 is a deficient number, since it is larger than the sum of its proper divisors (1).

55231751 is an equidigital number, since it uses as much as digits as its factorization.

55231751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5250, while the sum is 29.

The square root of 55231751 is about 7431.8067116953. The cubic root of 55231751 is about 380.8286418584.

The spelling of 55231751 in words is "fifty-five million, two hundred thirty-one thousand, seven hundred fifty-one".