51521346 has 32 divisors (see below), whose sum is σ = 115915200. Its totient is φ = 17172324.

The previous prime is 51521329. The next prime is 51521359. The reversal of 51521346 is 64312515.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1516 + ... + 10263.

It is an arithmetic number, because the mean of its divisors is an integer number (3622350).

Almost surely, 2^51521346 is an apocalyptic number.

51521346 is an abundant number, since it is smaller than the sum of its proper divisors (64393854).

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

51521346 is an equidigital number, since it uses as much as digits as its factorization.

51521346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11802 (or 11784 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51521346 is about 7177.8371394174. The cubic root of 51521346 is about 372.1023391691.

The spelling of 51521346 in words is "fifty-one million, five hundred twenty-one thousand, three hundred forty-six".