51440814 has 48 divisors (see below), whose sum is σ = 116900784. Its totient is φ = 16329600.

The previous prime is 51440801. The next prime is 51440911. The reversal of 51440814 is 41804415.

It is a happy number.

51440814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 30924 + ... + 32544.

It is an arithmetic number, because the mean of its divisors is an integer number (2435433).

Almost surely, 2^51440814 is an apocalyptic number.

51440814 is an abundant number, since it is smaller than the sum of its proper divisors (65459970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51440814 is a wasteful number, since it uses less digits than its factorization.

51440814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713 (or 1710 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 51440814 is about 7172.2251777255. The cubic root of 51440814 is about 371.9083627907.

It can be divided in two parts, 514 and 40814, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 51440814 in words is "fifty-one million, four hundred forty thousand, eight hundred fourteen".