51435464 has 8 divisors (see below), whose sum is σ = 96441510. Its totient is φ = 25717728.

The previous prime is 51435457. The next prime is 51435467. The reversal of 51435464 is 46453415.

It can be written as a sum of positive squares in only one way, i.e., 46812964 + 4622500 = 6842^2 + 2150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51435464.

It is not an unprimeable number, because it can be changed into a prime (51435467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214709 + ... + 3214724.

Almost surely, 2^51435464 is an apocalyptic number.

It is an amenable number.

51435464 is a deficient number, since it is larger than the sum of its proper divisors (45006046).

51435464 is a wasteful number, since it uses less digits than its factorization.

51435464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429439 (or 6429435 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 51435464 is about 7171.8522014888. The cubic root of 51435464 is about 371.8954691461.

Adding to 51435464 its reverse (46453415), we get a palindrome (97888879).

The spelling of 51435464 in words is "fifty-one million, four hundred thirty-five thousand, four hundred sixty-four".