157215207 has 16 divisors (see below), whose sum is σ = 213995520. Its totient is φ = 102645312.

The previous prime is 157215203. The next prime is 157215211. The reversal of 157215207 is 702512751.

It is an interprime number because it is at equal distance from previous prime (157215203) and next prime (157215211).

It is not a de Polignac number, because 157215207 - 2² = 157215203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157215203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25818 + ... + 31320.

It is an arithmetic number, because the mean of its divisors is an integer number (13374720).

Almost surely, 2^157215207 is an apocalyptic number.

157215207 is a deficient number, since it is larger than the sum of its proper divisors (56780313).

157215207 is a wasteful number, since it uses less digits than its factorization.

157215207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5702.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 157215207 is about 12538.5488394790. The cubic root of 157215207 is about 539.7154502217.

Adding to 157215207 its reverse (702512751), we get a palindrome (859727958).

The spelling of 157215207 in words is "one hundred fifty-seven million, two hundred fifteen thousand, two hundred seven".