531451123551 has 12 divisors (see below), whose sum is σ = 769331391712. Its totient is φ = 353525471136.

The previous prime is 531451123493. The next prime is 531451123591. The reversal of 531451123551 is 155321154135.

531451123551 is a `hidden beast` number, since 5 + 31 + 4 + 51 + 1 + 23 + 551 = 666.

It is not a de Polignac number, because 531451123551 - 2¹⁴ = 531451107167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531451123591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64602151 + ... + 64610376.

Almost surely, 2^531451123551 is an apocalyptic number.

531451123551 is a deficient number, since it is larger than the sum of its proper divisors (237880268161).

531451123551 is a wasteful number, since it uses less digits than its factorization.

531451123551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129212990 (or 129212987 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

Adding to 531451123551 its reverse (155321154135), we get a palindrome (686772277686).

The spelling of 531451123551 in words is "five hundred thirty-one billion, four hundred fifty-one million, one hundred twenty-three thousand, five hundred fifty-one".