51553650 has 48 divisors (see below), whose sum is σ = 134589600. Its totient is φ = 13023360.

The previous prime is 51553637. The next prime is 51553693. The reversal of 51553650 is 5635515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6195 + ... + 11894.

It is an arithmetic number, because the mean of its divisors is an integer number (2803950).

Almost surely, 2^51553650 is an apocalyptic number.

51553650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51553650 is an abundant number, since it is smaller than the sum of its proper divisors (83035950).

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

51553650 is a wasteful number, since it uses less digits than its factorization.

51553650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18123 (or 18118 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 51553650 is about 7180.0870468261. The cubic root of 51553650 is about 372.1800925891.

The spelling of 51553650 in words is "fifty-one million, five hundred fifty-three thousand, six hundred fifty".