13400215431 has 16 divisors (see below), whose sum is σ = 18291373056. Its totient is φ = 8721470016.

The previous prime is 13400215429. The next prime is 13400215463. The reversal of 13400215431 is 13451200431.

It is a happy number.

It is not a de Polignac number, because 13400215431 - 2¹ = 13400215429 is a prime.

It is a super-2 number, since 2×13400215431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13400215421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252211 + ... + 300683.

It is an arithmetic number, because the mean of its divisors is an integer number (1143210816).

Almost surely, 2^13400215431 is an apocalyptic number.

13400215431 is a deficient number, since it is larger than the sum of its proper divisors (4891157625).

13400215431 is a wasteful number, since it uses less digits than its factorization.

13400215431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50662.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 13400215431 its reverse (13451200431), we get a palindrome (26851415862).

The spelling of 13400215431 in words is "thirteen billion, four hundred million, two hundred fifteen thousand, four hundred thirty-one".