61512312 has 16 divisors (see below), whose sum is σ = 153780840. Its totient is φ = 20504096.

The previous prime is 61512289. The next prime is 61512337. The reversal of 61512312 is 21321516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281483 + ... + 1281530.

Almost surely, 2^61512312 is an apocalyptic number.

It is an amenable number.

61512312 is an abundant number, since it is smaller than the sum of its proper divisors (92268528).

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

61512312 is a wasteful number, since it uses less digits than its factorization.

61512312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563022 (or 2563018 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 61512312 is about 7842.9785158446. The cubic root of 61512312 is about 394.7486773864.

Adding to 61512312 its reverse (21321516), we get a palindrome (82833828).

The spelling of 61512312 in words is "sixty-one million, five hundred twelve thousand, three hundred twelve".