51520850 has 12 divisors (see below), whose sum is σ = 95828874. Its totient is φ = 20608320.

The previous prime is 51520801. The next prime is 51520867. The reversal of 51520850 is 5802515.

It can be written as a sum of positive squares in 3 ways, for example, as 42941809 + 8579041 = 6553^2 + 2929^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 515159 + ... + 515258.

Almost surely, 2^51520850 is an apocalyptic number.

51520850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51520850 is a deficient number, since it is larger than the sum of its proper divisors (44308024).

51520850 is a wasteful number, since it uses less digits than its factorization.

51520850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030429 (or 1030424 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 51520850 is about 7177.8025885364. The cubic root of 51520850 is about 372.1011450792.

The spelling of 51520850 in words is "fifty-one million, five hundred twenty thousand, eight hundred fifty".