51242023636 has 12 divisors (see below), whose sum is σ = 89992666260. Its totient is φ = 25529833280.

The previous prime is 51242023579. The next prime is 51242023639. The reversal of 51242023636 is 63632024215.

It can be written as a sum of positive squares in 2 ways, for example, as 36783404100 + 14458619536 = 191790^2 + 120244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242023639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22793371 + ... + 22795618.

It is an arithmetic number, because the mean of its divisors is an integer number (7499388855).

Almost surely, 2^51242023636 is an apocalyptic number.

It is an amenable number.

51242023636 is a deficient number, since it is larger than the sum of its proper divisors (38750642624).

51242023636 is a wasteful number, since it uses less digits than its factorization.

51242023636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45589274 (or 45589272 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 51242023636 in words is "fifty-one billion, two hundred forty-two million, twenty-three thousand, six hundred thirty-six".