51961512 has 16 divisors (see below), whose sum is σ = 129903840. Its totient is φ = 17320496.

The previous prime is 51961489. The next prime is 51961513. The reversal of 51961512 is 21516915.

51961512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51961512² = 5399997458652288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51961512.

It is not an unprimeable number, because it can be changed into a prime (51961513) 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 3 ways as a sum of consecutive naturals, for example, 1082508 + ... + 1082555.

It is an arithmetic number, because the mean of its divisors is an integer number (8118990).

Almost surely, 2^51961512 is an apocalyptic number.

It is an amenable number.

51961512 is an abundant number, since it is smaller than the sum of its proper divisors (77942328).

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

51961512 is a wasteful number, since it uses less digits than its factorization.

51961512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165072 (or 2165068 counting only the distinct ones).

The product of its digits is 2700, while the sum is 30.

The square root of 51961512 is about 7208.4333942959. The cubic root of 51961512 is about 373.1590052031.

The spelling of 51961512 in words is "fifty-one million, nine hundred sixty-one thousand, five hundred twelve".