55851157 has 2 divisors, whose sum is σ = 55851158. Its totient is φ = 55851156.

The previous prime is 55851121. The next prime is 55851163. The reversal of 55851157 is 75115855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34975396 + 20875761 = 5914^2 + 4569^2 .

It is a cyclic number.

It is not a de Polignac number, because 55851157 - 2¹¹ = 55849109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55851197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27925578 + 27925579.

It is an arithmetic number, because the mean of its divisors is an integer number (27925579).

Almost surely, 2^55851157 is an apocalyptic number.

It is an amenable number.

55851157 is a deficient number, since it is larger than the sum of its proper divisors (1).

55851157 is an equidigital number, since it uses as much as digits as its factorization.

55851157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35000, while the sum is 37.

The square root of 55851157 is about 7473.3631652690. The cubic root of 55851157 is about 382.2469757827.

It can be divided in two parts, 558 and 51157, that added together give a palindrome (51715).

The spelling of 55851157 in words is "fifty-five million, eight hundred fifty-one thousand, one hundred fifty-seven".