55157647 has 2 divisors, whose sum is σ = 55157648. Its totient is φ = 55157646.

The previous prime is 55157629. The next prime is 55157651. The reversal of 55157647 is 74675155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55157647 - 2²³ = 46769039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55157617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27578823 + 27578824.

It is an arithmetic number, because the mean of its divisors is an integer number (27578824).

Almost surely, 2^55157647 is an apocalyptic number.

55157647 is a deficient number, since it is larger than the sum of its proper divisors (1).

55157647 is an equidigital number, since it uses as much as digits as its factorization.

55157647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147000, while the sum is 40.

The square root of 55157647 is about 7426.8194403796. The cubic root of 55157647 is about 380.6582473791.

The spelling of 55157647 in words is "fifty-five million, one hundred fifty-seven thousand, six hundred forty-seven".