157381557 has 4 divisors (see below), whose sum is σ = 209842080. Its totient is φ = 104921036.

The previous prime is 157381547. The next prime is 157381559. The reversal of 157381557 is 755183751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157381557 - 2⁷ = 157381429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157381559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26230257 + ... + 26230262.

It is an arithmetic number, because the mean of its divisors is an integer number (52460520).

Almost surely, 2^157381557 is an apocalyptic number.

It is an amenable number.

157381557 is a deficient number, since it is larger than the sum of its proper divisors (52460523).

157381557 is an equidigital number, since it uses as much as digits as its factorization.

157381557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52460522.

The product of its digits is 147000, while the sum is 42.

The square root of 157381557 is about 12545.1806284326. The cubic root of 157381557 is about 539.9057414354.

The spelling of 157381557 in words is "one hundred fifty-seven million, three hundred eighty-one thousand, five hundred fifty-seven".