51442464 has 24 divisors (see below), whose sum is σ = 135036720. Its totient is φ = 17147456.

The previous prime is 51442453. The next prime is 51442499. The reversal of 51442464 is 46424415.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267834 + ... + 268025.

It is an arithmetic number, because the mean of its divisors is an integer number (5626530).

Almost surely, 2^51442464 is an apocalyptic number.

It is an amenable number.

51442464 is an abundant number, since it is smaller than the sum of its proper divisors (83594256).

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

51442464 is a wasteful number, since it uses less digits than its factorization.

51442464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535872 (or 535864 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 51442464 is about 7172.3402038665. The cubic root of 51442464 is about 371.9123391550.

Adding to 51442464 its reverse (46424415), we get a palindrome (97866879).

The spelling of 51442464 in words is "fifty-one million, four hundred forty-two thousand, four hundred sixty-four".