15040135231 has 8 divisors (see below), whose sum is σ = 16489872000. Its totient is φ = 13604140440.

The previous prime is 15040135213. The next prime is 15040135249. The reversal of 15040135231 is 13253104051.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15040135213) and next prime (15040135249).

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

It is not a de Polignac number, because 15040135231 - 2⁵ = 15040135199 is a prime.

It is a super-2 number, since 2×15040135231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15040135196 and 15040135205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15040135211) 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, 3433201 + ... + 3437578.

It is an arithmetic number, because the mean of its divisors is an integer number (2061234000).

Almost surely, 2^15040135231 is an apocalyptic number.

15040135231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15040135231 is a deficient number, since it is larger than the sum of its proper divisors (1449736769).

15040135231 is a wasteful number, since it uses less digits than its factorization.

15040135231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870989.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 15040135231 its reverse (13253104051), we get a palindrome (28293239282).

The spelling of 15040135231 in words is "fifteen billion, forty million, one hundred thirty-five thousand, two hundred thirty-one".