51469894 has 16 divisors (see below), whose sum is σ = 90036000. Its totient is φ = 22058232.

The previous prime is 51469823. The next prime is 51469907. The reversal of 51469894 is 49896415.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36829 + ... + 38200.

It is an arithmetic number, because the mean of its divisors is an integer number (5627250).

Almost surely, 2^51469894 is an apocalyptic number.

51469894 is a deficient number, since it is larger than the sum of its proper divisors (38566106).

51469894 is an equidigital number, since it uses as much as digits as its factorization.

51469894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75052 (or 75038 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 51469894 is about 7174.2521561484. The cubic root of 51469894 is about 371.9784307454.

The spelling of 51469894 in words is "fifty-one million, four hundred sixty-nine thousand, eight hundred ninety-four".