551215442531 has 16 divisors (see below), whose sum is σ = 611227780800. Its totient is φ = 493789696128.

The previous prime is 551215442467. The next prime is 551215442543. The reversal of 551215442531 is 135244512155.

It is a cyclic number.

It is not a de Polignac number, because 551215442531 - 2⁶ = 551215442467 is a prime.

It is a super-2 number, since 2×551215442531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551215442551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1285871 + ... + 1660088.

It is an arithmetic number, because the mean of its divisors is an integer number (38201736300).

Almost surely, 2^551215442531 is an apocalyptic number.

551215442531 is a deficient number, since it is larger than the sum of its proper divisors (60012338269).

551215442531 is a wasteful number, since it uses less digits than its factorization.

551215442531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946398.

The product of its digits is 120000, while the sum is 38.

Adding to 551215442531 its reverse (135244512155), we get a palindrome (686459954686).

The spelling of 551215442531 in words is "five hundred fifty-one billion, two hundred fifteen million, four hundred forty-two thousand, five hundred thirty-one".