612221512 has 32 divisors (see below), whose sum is σ = 1343905920. Its totient is φ = 255980160.

The previous prime is 612221509. The next prime is 612221513. The reversal of 612221512 is 215122216.

It is a super-2 number, since 2×612221512² = 749630359511132288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (612221513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131028 + ... + 135619.

It is an arithmetic number, because the mean of its divisors is an integer number (41997060).

Almost surely, 2^612221512 is an apocalyptic number.

It is an amenable number.

612221512 is an abundant number, since it is smaller than the sum of its proper divisors (731684408).

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

612221512 is a wasteful number, since it uses less digits than its factorization.

612221512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266701 (or 266697 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 612221512 is about 24743.1103946129. The cubic root of 612221512 is about 849.1208959531.

Adding to 612221512 its reverse (215122216), we get a palindrome (827343728).

The spelling of 612221512 in words is "six hundred twelve million, two hundred twenty-one thousand, five hundred twelve".