51557470 has 16 divisors (see below), whose sum is σ = 93724128. Its totient is φ = 20418400.

The previous prime is 51557423. The next prime is 51557501. The reversal of 51557470 is 7475515.

It is a happy number.

51557470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24514 + ... + 26533.

It is an arithmetic number, because the mean of its divisors is an integer number (5857758).

Almost surely, 2^51557470 is an apocalyptic number.

51557470 is a deficient number, since it is larger than the sum of its proper divisors (42166658).

51557470 is a wasteful number, since it uses less digits than its factorization.

51557470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51155.

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 51557470 is about 7180.3530553866. The cubic root of 51557470 is about 372.1892849084.

The spelling of 51557470 in words is "fifty-one million, five hundred fifty-seven thousand, four hundred seventy".