51553442531 has 8 divisors (see below), whose sum is σ = 54588698064. Its totient is φ = 48518487040.

The previous prime is 51553442527. The next prime is 51553442581. The reversal of 51553442531 is 13524435515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51553442531 - 2² = 51553442527 is a prime.

It is a super-2 number, since 2×51553442531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51553442581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346451 + ... + 472371.

It is an arithmetic number, because the mean of its divisors is an integer number (6823587258).

Almost surely, 2^51553442531 is an apocalyptic number.

51553442531 is a deficient number, since it is larger than the sum of its proper divisors (3035255533).

51553442531 is a wasteful number, since it uses less digits than its factorization.

51553442531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150021.

The product of its digits is 180000, while the sum is 38.

The spelling of 51553442531 in words is "fifty-one billion, five hundred fifty-three million, four hundred forty-two thousand, five hundred thirty-one".