51521464 has 32 divisors (see below), whose sum is σ = 104446800. Its totient is φ = 23742720.

The previous prime is 51521443. The next prime is 51521467. The reversal of 51521464 is 46412515.

It is a super-2 number, since 2×51521464² = 5308922505406592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51521467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1044 + ... + 10204.

Almost surely, 2^51521464 is an apocalyptic number.

It is an amenable number.

51521464 is an abundant number, since it is smaller than the sum of its proper divisors (52925336).

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

51521464 is a wasteful number, since it uses less digits than its factorization.

51521464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9223 (or 9219 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 51521464 is about 7177.8453591590. The cubic root of 51521464 is about 372.1026232458.

Adding to 51521464 its reverse (46412515), we get a palindrome (97933979).

The spelling of 51521464 in words is "fifty-one million, five hundred twenty-one thousand, four hundred sixty-four".