157382581 has 2 divisors, whose sum is σ = 157382582. Its totient is φ = 157382580.

The previous prime is 157382569. The next prime is 157382627. The reversal of 157382581 is 185283751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142683025 + 14699556 = 11945^2 + 3834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157382581 is a prime.

It is a super-2 number, since 2×157382581² = 49538553604443122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157382521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78691290 + 78691291.

It is an arithmetic number, because the mean of its divisors is an integer number (78691291).

Almost surely, 2^157382581 is an apocalyptic number.

It is an amenable number.

157382581 is a deficient number, since it is larger than the sum of its proper divisors (1).

157382581 is an equidigital number, since it uses as much as digits as its factorization.

157382581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 40.

The square root of 157382581 is about 12545.2214408515. The cubic root of 157382581 is about 539.9069123949.

The spelling of 157382581 in words is "one hundred fifty-seven million, three hundred eighty-two thousand, five hundred eighty-one".