51520374361 has 7 divisors (see below), whose sum is σ = 52379047267. Its totient is φ = 50675778060.

The previous prime is 51520374349. The next prime is 51520374383. The reversal of 51520374361 is 16347302515.

The square root of 51520374361 is 226981.

The cubic root of 51520374361 is 3721.

It is a perfect power (a square, a cube, a 6-th power), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 13798965961 + 37721408400 = 117469^2 + 194220^2 .

It is not a de Polignac number, because 51520374361 - 2¹³ = 51520366169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51520374361.

It is not an unprimeable number, because it can be changed into a prime (51520374761) by changing a digit.

It is a polite number, since it can be written in 6 ways as a sum of consecutive naturals, for example, 844596271 + ... + 844596331.

Almost surely, 2^51520374361 is an apocalyptic number.

51520374361 is the 226981-st square number.

51520374361 is the 113491-st centered octagonal number.

It is an amenable number.

51520374361 is a deficient number, since it is larger than the sum of its proper divisors (858672906).

51520374361 is an frugal number, since it uses more digits than its factorization.

51520374361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

Adding to 51520374361 its reverse (16347302515), we get a palindrome (67867676876).

The spelling of 51520374361 in words is "fifty-one billion, five hundred twenty million, three hundred seventy-four thousand, three hundred sixty-one".