51555342031 has 8 divisors (see below), whose sum is σ = 52105339728. Its totient is φ = 51006120000.

The previous prime is 51555341951. The next prime is 51555342061. The reversal of 51555342031 is 13024355515.

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 51555342031 - 2²⁷ = 51421124303 is a prime.

It is a super-2 number, since 2×51555342031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555342061) 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, 59785 + ... + 326626.

It is an arithmetic number, because the mean of its divisors is an integer number (6513167466).

Almost surely, 2^51555342031 is an apocalyptic number.

51555342031 is a deficient number, since it is larger than the sum of its proper divisors (549997697).

51555342031 is a wasteful number, since it uses less digits than its factorization.

51555342031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387833.

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 51555342031 its reverse (13024355515), we get a palindrome (64579697546).

The spelling of 51555342031 in words is "fifty-one billion, five hundred fifty-five million, three hundred forty-two thousand, thirty-one".