551245321431 has 48 divisors (see below), whose sum is σ = 929004481600. Its totient is φ = 314847751680.

The previous prime is 551245321387. The next prime is 551245321513. The reversal of 551245321431 is 134123542155.

551245321431 is a `hidden beast` number, since 5 + 51 + 245 + 321 + 43 + 1 = 666.

It is not a de Polignac number, because 551245321431 - 2²⁶ = 551178212567 is a prime.

It is a super-2 number, since 2×551245321431² (a number of 24 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 (551245321831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6629691 + ... + 6712323.

Almost surely, 2^551245321431 is an apocalyptic number.

551245321431 is a deficient number, since it is larger than the sum of its proper divisors (377759160169).

551245321431 is a wasteful number, since it uses less digits than its factorization.

551245321431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84821 (or 84804 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

Adding to 551245321431 its reverse (134123542155), we get a palindrome (685368863586).

The spelling of 551245321431 in words is "five hundred fifty-one billion, two hundred forty-five million, three hundred twenty-one thousand, four hundred thirty-one".