51520670 has 16 divisors (see below), whose sum is σ = 92821680. Its totient is φ = 20589504.

The previous prime is 51520643. The next prime is 51520709. The reversal of 51520670 is 7602515.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 16061 + ... + 18999.

It is an arithmetic number, because the mean of its divisors is an integer number (5801355).

Almost surely, 2^51520670 is an apocalyptic number.

51520670 is a deficient number, since it is larger than the sum of its proper divisors (41301010).

51520670 is a wasteful number, since it uses less digits than its factorization.

51520670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 51520670 is about 7177.7900498691. The cubic root of 51520670 is about 372.1007117382.

The spelling of 51520670 in words is "fifty-one million, five hundred twenty thousand, six hundred seventy".