1215312164 has 24 divisors (see below), whose sum is σ = 2400148800. Its totient is φ = 533365280.

The previous prime is 1215312107. The next prime is 1215312169. The reversal of 1215312164 is 4612135121.

It is not an unprimeable number, because it can be changed into a prime (1215312169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474944 + ... + 477495.

It is an arithmetic number, because the mean of its divisors is an integer number (100006200).

Almost surely, 2^1215312164 is an apocalyptic number.

It is an amenable number.

1215312164 is a deficient number, since it is larger than the sum of its proper divisors (1184836636).

1215312164 is a wasteful number, since it uses less digits than its factorization.

1215312164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952483 (or 952481 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 1215312164 is about 34861.3276281900. The cubic root of 1215312164 is about 1067.1593690395.

Adding to 1215312164 its reverse (4612135121), we get a palindrome (5827447285).

The spelling of 1215312164 in words is "one billion, two hundred fifteen million, three hundred twelve thousand, one hundred sixty-four".