55890157 has 2 divisors, whose sum is σ = 55890158. Its totient is φ = 55890156.

The previous prime is 55890103. The next prime is 55890167. The reversal of 55890157 is 75109855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38700841 + 17189316 = 6221^2 + 4146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55890157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55890167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27945078 + 27945079.

It is an arithmetic number, because the mean of its divisors is an integer number (27945079).

Almost surely, 2^55890157 is an apocalyptic number.

It is an amenable number.

55890157 is a deficient number, since it is larger than the sum of its proper divisors (1).

55890157 is an equidigital number, since it uses as much as digits as its factorization.

55890157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 55890157 is about 7475.9719769405. The cubic root of 55890157 is about 382.3359274671.

The spelling of 55890157 in words is "fifty-five million, eight hundred ninety thousand, one hundred fifty-seven".