51813554 has 16 divisors (see below), whose sum is σ = 84056280. Its totient is φ = 23811840.

The previous prime is 51813529. The next prime is 51813563. The reversal of 51813554 is 45531815.

51813554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 49632025 + 2181529 = 7045^2 + 1477^2 .

It is a super-2 number, since 2×51813554² = 5369288756221832, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51813554.

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, 2132 + ... + 10400.

Almost surely, 2^51813554 is an apocalyptic number.

51813554 is a deficient number, since it is larger than the sum of its proper divisors (32242726).

51813554 is a wasteful number, since it uses less digits than its factorization.

51813554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8525.

The product of its digits is 12000, while the sum is 32.

The square root of 51813554 is about 7198.1632379379. The cubic root of 51813554 is about 372.8044841648.

The spelling of 51813554 in words is "fifty-one million, eight hundred thirteen thousand, five hundred fifty-four".