13540631 has 8 divisors (see below), whose sum is σ = 14976864. Its totient is φ = 12160800.

The previous prime is 13540627. The next prime is 13540643. The reversal of 13540631 is 13604531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13540631 - 2² = 13540627 is a prime.

It is a super-2 number, since 2×13540631² = 366697375756322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13540597 and 13540606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13540601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13595 + ... + 14556.

It is an arithmetic number, because the mean of its divisors is an integer number (1872108).

Almost surely, 2^13540631 is an apocalyptic number.

13540631 is a deficient number, since it is larger than the sum of its proper divisors (1436233).

13540631 is a wasteful number, since it uses less digits than its factorization.

13540631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28201.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 13540631 is about 3679.7596388895. The cubic root of 13540631 is about 238.3487988834.

The spelling of 13540631 in words is "thirteen million, five hundred forty thousand, six hundred thirty-one".