157481091 has 10 divisors (see below), whose sum is σ = 235249652. Its totient is φ = 104987340.

The previous prime is 157481087. The next prime is 157481099. The reversal of 157481091 is 190184751.

157481091 is a `hidden beast` number, since 1 + 574 + 81 + 0 + 9 + 1 = 666.

It is not a de Polignac number, because 157481091 - 2² = 157481087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157481099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 972025 + ... + 972186.

Almost surely, 2^157481091 is an apocalyptic number.

157481091 is a deficient number, since it is larger than the sum of its proper divisors (77768561).

157481091 is an equidigital number, since it uses as much as digits as its factorization.

157481091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944223 (or 1944214 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 157481091 is about 12549.1470228060. The cubic root of 157481091 is about 540.0195363302.

The spelling of 157481091 in words is "one hundred fifty-seven million, four hundred eighty-one thousand, ninety-one".