531197812151 has 4 divisors (see below), whose sum is σ = 531199588152. Its totient is φ = 531196036152.

The previous prime is 531197812049. The next prime is 531197812169. The reversal of 531197812151 is 151218791135.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 531197812151 - 2²⁶ = 531130703287 is a prime.

It is a super-2 number, since 2×531197812151² (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 (531197812751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316940 + ... + 1078353.

It is an arithmetic number, because the mean of its divisors is an integer number (132799897038).

Almost surely, 2^531197812151 is an apocalyptic number.

531197812151 is a deficient number, since it is larger than the sum of its proper divisors (1776001).

531197812151 is a wasteful number, since it uses less digits than its factorization.

531197812151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776000.

The product of its digits is 75600, while the sum is 44.

The spelling of 531197812151 in words is "five hundred thirty-one billion, one hundred ninety-seven million, eight hundred twelve thousand, one hundred fifty-one".