51654464 has 56 divisors (see below), whose sum is σ = 109179360. Its totient is φ = 24178176.

The previous prime is 51654461. The next prime is 51654487. The reversal of 51654464 is 46445615.

It is a super-2 number, since 2×51654464² = 5336367302254592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51654461) 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, 129914 + ... + 130310.

Almost surely, 2^51654464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51654464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54589680).

51654464 is an abundant number, since it is smaller than the sum of its proper divisors (57524896).

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

51654464 is a wasteful number, since it uses less digits than its factorization.

51654464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 525 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 51654464 is about 7187.1040064827. The cubic root of 51654464 is about 372.4225360292.

The spelling of 51654464 in words is "fifty-one million, six hundred fifty-four thousand, four hundred sixty-four".