51812046 has 48 divisors (see below), whose sum is σ = 131891760. Its totient is φ = 14492160.

The previous prime is 51812017. The next prime is 51812051. The reversal of 51812046 is 64021815.

It is a super-2 number, since 2×51812046² = 5368976221412232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7491 + ... + 12638.

It is an arithmetic number, because the mean of its divisors is an integer number (2747745).

Almost surely, 2^51812046 is an apocalyptic number.

51812046 is an abundant number, since it is smaller than the sum of its proper divisors (80079714).

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

51812046 is a wasteful number, since it uses less digits than its factorization.

51812046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20161 (or 20158 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 51812046 is about 7198.0584882314. The cubic root of 51812046 is about 372.8008673852.

It can be divided in two parts, 5181 and 2046, that added together give a palindrome (7227).

The spelling of 51812046 in words is "fifty-one million, eight hundred twelve thousand, forty-six".