51520050 has 60 divisors (see below), whose sum is σ = 143160666. Its totient is φ = 13737600.

The previous prime is 51520043. The next prime is 51520093. The reversal of 51520050 is 5002515.

It can be written as a sum of positive squares in 3 ways, for example, as 46416969 + 5103081 = 6813^2 + 2259^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2311 + ... + 10410.

Almost surely, 2^51520050 is an apocalyptic number.

51520050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51520050 is an abundant number, since it is smaller than the sum of its proper divisors (91640616).

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

51520050 is a wasteful number, since it uses less digits than its factorization.

51520050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12745 (or 12731 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 51520050 is about 7177.7468609585. The cubic root of 51520050 is about 372.0992191116.

Adding to 51520050 its reverse (5002515), we get a palindrome (56522565).

The spelling of 51520050 in words is "fifty-one million, five hundred twenty thousand, fifty".