73131212 has 48 divisors (see below), whose sum is σ = 168956928. Its totient is φ = 26814720.

The previous prime is 73131199. The next prime is 73131241. The reversal of 73131212 is 21213137.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1748 + ... + 12219.

It is an arithmetic number, because the mean of its divisors is an integer number (3519936).

Almost surely, 2^73131212 is an apocalyptic number.

It is an amenable number.

73131212 is an abundant number, since it is smaller than the sum of its proper divisors (95825716).

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

73131212 is a wasteful number, since it uses less digits than its factorization.

73131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14006 (or 14004 counting only the distinct ones).

The product of its digits is 252, while the sum is 20.

The square root of 73131212 is about 8551.6788994910. The cubic root of 73131212 is about 418.1841713392.

Adding to 73131212 its reverse (21213137), we get a palindrome (94344349).

The spelling of 73131212 in words is "seventy-three million, one hundred thirty-one thousand, two hundred twelve".