53651500 has 48 divisors (see below), whose sum is σ = 133922880. Its totient is φ = 18393600.

The previous prime is 53651471. The next prime is 53651509. The reversal of 53651500 is 515635.

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

It is not an unprimeable number, because it can be changed into a prime (53651509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4165 + ... + 11164.

It is an arithmetic number, because the mean of its divisors is an integer number (2790060).

Almost surely, 2^53651500 is an apocalyptic number.

53651500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

53651500 is an abundant number, since it is smaller than the sum of its proper divisors (80271380).

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

53651500 is a wasteful number, since it uses less digits than its factorization.

53651500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15355 (or 15343 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 53651500 is about 7324.7184246222. The cubic root of 53651500 is about 377.1614437525.

The spelling of 53651500 in words is "fifty-three million, six hundred fifty-one thousand, five hundred".