51520406 has 8 divisors (see below), whose sum is σ = 88320720. Its totient is φ = 22080168.

The previous prime is 51520379. The next prime is 51520411. The reversal of 51520406 is 60402515.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1840001 + ... + 1840028.

It is an arithmetic number, because the mean of its divisors is an integer number (11040090).

Almost surely, 2^51520406 is an apocalyptic number.

51520406 is a deficient number, since it is larger than the sum of its proper divisors (36800314).

51520406 is a wasteful number, since it uses less digits than its factorization.

51520406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680038.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 51520406 is about 7177.7716597841. The cubic root of 51520406 is about 372.1000761697.

The spelling of 51520406 in words is "fifty-one million, five hundred twenty thousand, four hundred six".