131231015 has 8 divisors (see below), whose sum is σ = 157556880. Its totient is φ = 104931712.

The previous prime is 131230999. The next prime is 131231027. The reversal of 131231015 is 510132131.

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 131231015 - 2⁴ = 131230999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131230984 and 131231002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6656 + ... + 17514.

It is an arithmetic number, because the mean of its divisors is an integer number (19694610).

Almost surely, 2^131231015 is an apocalyptic number.

131231015 is a deficient number, since it is larger than the sum of its proper divisors (26325865).

131231015 is a wasteful number, since it uses less digits than its factorization.

131231015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13281.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 131231015 is about 11455.6106340954. The cubic root of 131231015 is about 508.1736740071.

Adding to 131231015 its reverse (510132131), we get a palindrome (641363146).

The spelling of 131231015 in words is "one hundred thirty-one million, two hundred thirty-one thousand, fifteen".