51920452 has 12 divisors (see below), whose sum is σ = 90949180. Its totient is φ = 25934976.

The previous prime is 51920441. The next prime is 51920461. The reversal of 51920452 is 25402915.

It can be written as a sum of positive squares in 2 ways, for example, as 16112196 + 35808256 = 4014^2 + 5984^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51920452.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233 + ... + 10264.

Almost surely, 2^51920452 is an apocalyptic number.

It is an amenable number.

51920452 is a deficient number, since it is larger than the sum of its proper divisors (39028728).

51920452 is a wasteful number, since it uses less digits than its factorization.

51920452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12630 (or 12628 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 51920452 is about 7205.5847784895. The cubic root of 51920452 is about 373.0606891885.

The spelling of 51920452 in words is "fifty-one million, nine hundred twenty thousand, four hundred fifty-two".