157312218 has 16 divisors (see below), whose sum is σ = 359570880. Its totient is φ = 44946336.

The previous prime is 157312151. The next prime is 157312261. The reversal of 157312218 is 812213751.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1872723 + ... + 1872806.

It is an arithmetic number, because the mean of its divisors is an integer number (22473180).

Almost surely, 2^157312218 is an apocalyptic number.

157312218 is an abundant number, since it is smaller than the sum of its proper divisors (202258662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157312218 is a wasteful number, since it uses less digits than its factorization.

157312218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745541.

The product of its digits is 3360, while the sum is 30.

The square root of 157312218 is about 12542.4167527634. The cubic root of 157312218 is about 539.8264394210.

Adding to 157312218 its reverse (812213751), we get a palindrome (969525969).

The spelling of 157312218 in words is "one hundred fifty-seven million, three hundred twelve thousand, two hundred eighteen".