157215073 has 4 divisors (see below), whose sum is σ = 157251888. Its totient is φ = 157178260.

The previous prime is 157215053. The next prime is 157215089. The reversal of 157215073 is 370512751.

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 a de Polignac number, because none of the positive numbers 2^k-157215073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157215053) 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, 11011 + ... + 20872.

It is an arithmetic number, because the mean of its divisors is an integer number (39312972).

Almost surely, 2^157215073 is an apocalyptic number.

It is an amenable number.

157215073 is a deficient number, since it is larger than the sum of its proper divisors (36815).

157215073 is an equidigital number, since it uses as much as digits as its factorization.

157215073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36814.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 157215073 is about 12538.5434959568. The cubic root of 157215073 is about 539.7152968822.

The spelling of 157215073 in words is "one hundred fifty-seven million, two hundred fifteen thousand, seventy-three".