51464500 has 24 divisors (see below), whose sum is σ = 112399560. Its totient is φ = 20585600.

The previous prime is 51464467. The next prime is 51464503. The reversal of 51464500 is 546415.

It can be written as a sum of positive squares in 4 ways, for example, as 599076 + 50865424 = 774^2 + 7132^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51464503) 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, 50965 + ... + 51964.

It is an arithmetic number, because the mean of its divisors is an integer number (4683315).

Almost surely, 2^51464500 is an apocalyptic number.

51464500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51464500 is an abundant number, since it is smaller than the sum of its proper divisors (60935060).

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

51464500 is a wasteful number, since it uses less digits than its factorization.

51464500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102948 (or 102936 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51464500 is about 7173.8762186143. The cubic root of 51464500 is about 371.9654359531.

The spelling of 51464500 in words is "fifty-one million, four hundred sixty-four thousand, five hundred".