51462440 has 16 divisors (see below), whose sum is σ = 115790580. Its totient is φ = 20584960.

The previous prime is 51462419. The next prime is 51462473. The reversal of 51462440 is 4426415.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 454276 = 7142^2 + 674^2 .

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, 643241 + ... + 643320.

Almost surely, 2^51462440 is an apocalyptic number.

It is an amenable number.

51462440 is an abundant number, since it is smaller than the sum of its proper divisors (64328140).

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

51462440 is a wasteful number, since it uses less digits than its factorization.

51462440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286572 (or 1286568 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 51462440 is about 7173.7326406830. The cubic root of 51462440 is about 371.9604729266.

Adding to 51462440 its reverse (4426415), we get a palindrome (55888855).

The spelling of 51462440 in words is "fifty-one million, four hundred sixty-two thousand, four hundred forty".