51255636 has 24 divisors (see below), whose sum is σ = 121236864. Its totient is φ = 16850880.

The previous prime is 51255623. The next prime is 51255637. The reversal of 51255636 is 63655215.

It is a junction number, because it is equal to n+sod(n) for n = 51255597 and 51255606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51255637) 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 7 ways as a sum of consecutive naturals, for example, 28380 + ... + 30131.

It is an arithmetic number, because the mean of its divisors is an integer number (5051536).

Almost surely, 2^51255636 is an apocalyptic number.

It is an amenable number.

51255636 is an abundant number, since it is smaller than the sum of its proper divisors (69981228).

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

51255636 is a wasteful number, since it uses less digits than its factorization.

51255636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58591 (or 58589 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 51255636 is about 7159.3041561314. The cubic root of 51255636 is about 371.4615577072.

The spelling of 51255636 in words is "fifty-one million, two hundred fifty-five thousand, six hundred thirty-six".