51556653 has 6 divisors (see below), whose sum is σ = 74470734. Its totient is φ = 34371096.

The previous prime is 51556643. The next prime is 51556663. The reversal of 51556653 is 35665515.

51556653 is a `hidden beast` number, since 51 + 556 + 6 + 53 = 666.

It is an interprime number because it is at equal distance from previous prime (51556643) and next prime (51556663).

It can be written as a sum of positive squares in only one way, i.e., 47858724 + 3697929 = 6918^2 + 1923^2 .

It is not a de Polignac number, because 51556653 - 2⁵ = 51556621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51556643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2864250 + ... + 2864267.

It is an arithmetic number, because the mean of its divisors is an integer number (12411789).

Almost surely, 2^51556653 is an apocalyptic number.

It is an amenable number.

51556653 is a deficient number, since it is larger than the sum of its proper divisors (22914081).

51556653 is a wasteful number, since it uses less digits than its factorization.

51556653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728523 (or 5728520 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 51556653 is about 7180.2961638083. The cubic root of 51556653 is about 372.1873189453.

The spelling of 51556653 in words is "fifty-one million, five hundred fifty-six thousand, six hundred fifty-three".