215551157 has 2 divisors, whose sum is σ = 215551158. Its totient is φ = 215551156.

The previous prime is 215551129. The next prime is 215551241. The reversal of 215551157 is 751155512.

215551157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173027716 + 42523441 = 13154^2 + 6521^2 .

It is a cyclic number.

It is not a de Polignac number, because 215551157 - 2⁸ = 215550901 is a prime.

It is equal to p_11891066 and since 215551157 and 11891066 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215551117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107775578 + 107775579.

It is an arithmetic number, because the mean of its divisors is an integer number (107775579).

Almost surely, 2^215551157 is an apocalyptic number.

It is an amenable number.

215551157 is a deficient number, since it is larger than the sum of its proper divisors (1).

215551157 is an equidigital number, since it uses as much as digits as its factorization.

215551157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8750, while the sum is 32.

The square root of 215551157 is about 14681.6605668432. The cubic root of 215551157 is about 599.5841164310.

The spelling of 215551157 in words is "two hundred fifteen million, five hundred fifty-one thousand, one hundred fifty-seven".