51606504 has 32 divisors (see below), whose sum is σ = 143352000. Its totient is φ = 17202096.

The previous prime is 51606491. The next prime is 51606521. The reversal of 51606504 is 40560615.

It is a happy number.

51606504 is a `hidden beast` number, since 5 + 1 + 6 + 0 + 650 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119244 + ... + 119675.

It is an arithmetic number, because the mean of its divisors is an integer number (4479750).

Almost surely, 2^51606504 is an apocalyptic number.

51606504 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51606504 is an abundant number, since it is smaller than the sum of its proper divisors (91745496).

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

51606504 is a wasteful number, since it uses less digits than its factorization.

51606504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238934 (or 238924 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 51606504 is about 7183.7666999980. The cubic root of 51606504 is about 372.3072383746.

It can be divided in two parts, 5160 and 6504, that added together give a square (11664 = 108²).

The spelling of 51606504 in words is "fifty-one million, six hundred six thousand, five hundred four".