157901551 has 2 divisors, whose sum is σ = 157901552. Its totient is φ = 157901550.

The previous prime is 157901539. The next prime is 157901561. The reversal of 157901551 is 155109751.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157901551 - 2⁵ = 157901519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157901501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78950775 + 78950776.

It is an arithmetic number, because the mean of its divisors is an integer number (78950776).

Almost surely, 2^157901551 is an apocalyptic number.

157901551 is a deficient number, since it is larger than the sum of its proper divisors (1).

157901551 is an equidigital number, since it uses as much as digits as its factorization.

157901551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7875, while the sum is 34.

The square root of 157901551 is about 12565.8883888088. Note that the first 3 decimals coincide. The cubic root of 157901551 is about 540.4997100421.

The spelling of 157901551 in words is "one hundred fifty-seven million, nine hundred one thousand, five hundred fifty-one".