51501894 has 16 divisors (see below), whose sum is σ = 108425280. Its totient is φ = 16263720.

The previous prime is 51501893. The next prime is 51501949. The reversal of 51501894 is 49810515.

51501894 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 not an unprimeable number, because it can be changed into a prime (51501893) by changing a digit.

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, 225772 + ... + 225999.

It is an arithmetic number, because the mean of its divisors is an integer number (6776580).

Almost surely, 2^51501894 is an apocalyptic number.

51501894 is an abundant number, since it is smaller than the sum of its proper divisors (56923386).

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

51501894 is a wasteful number, since it uses less digits than its factorization.

51501894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451795.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 51501894 is about 7176.4820072233. The cubic root of 51501894 is about 372.0555039161.

The spelling of 51501894 in words is "fifty-one million, five hundred one thousand, eight hundred ninety-four".