157244387 has 4 divisors (see below), whose sum is σ = 157290576. Its totient is φ = 157198200.

The previous prime is 157244357. The next prime is 157244401. The reversal of 157244387 is 783442751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157244387 - 2²² = 153050083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157244317) 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, 17543 + ... + 24944.

It is an arithmetic number, because the mean of its divisors is an integer number (39322644).

Almost surely, 2^157244387 is an apocalyptic number.

157244387 is a deficient number, since it is larger than the sum of its proper divisors (46189).

157244387 is an equidigital number, since it uses as much as digits as its factorization.

157244387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46188.

The product of its digits is 188160, while the sum is 41.

The square root of 157244387 is about 12539.7123970209. The cubic root of 157244387 is about 539.7488395332.

The spelling of 157244387 in words is "one hundred fifty-seven million, two hundred forty-four thousand, three hundred eighty-seven".