13197531951 has 24 divisors (see below), whose sum is σ = 19941663456. Its totient is φ = 8394777600.

The previous prime is 13197531931. The next prime is 13197531959. The reversal of 13197531951 is 15913579131.

13197531951 is a `hidden beast` number, since 13 + 19 + 7 + 531 + 95 + 1 = 666.

13197531951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13197531951 - 2¹⁴ = 13197515567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13197531897 and 13197531906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13197531959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3511 + ... + 162503.

It is an arithmetic number, because the mean of its divisors is an integer number (830902644).

Almost surely, 2^13197531951 is an apocalyptic number.

13197531951 is a deficient number, since it is larger than the sum of its proper divisors (6744131505).

13197531951 is a wasteful number, since it uses less digits than its factorization.

13197531951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159423 (or 159420 counting only the distinct ones).

The product of its digits is 127575, while the sum is 45.

The spelling of 13197531951 in words is "thirteen billion, one hundred ninety-seven million, five hundred thirty-one thousand, nine hundred fifty-one".