131031145 has 16 divisors (see below), whose sum is σ = 183369600. Its totient is φ = 89848752.

The previous prime is 131031137. The next prime is 131031167. The reversal of 131031145 is 541130131.

It is not a de Polignac number, because 131031145 - 2³ = 131031137 is a prime.

It is a super-2 number, since 2×131031145² = 34338321920022050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36487 + ... + 39916.

It is an arithmetic number, because the mean of its divisors is an integer number (11460600).

Almost surely, 2^131031145 is an apocalyptic number.

It is an amenable number.

131031145 is a deficient number, since it is larger than the sum of its proper divisors (52338455).

131031145 is an frugal number, since it uses more digits than its factorization.

131031145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76429 (or 76415 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 131031145 is about 11446.8836370429. The cubic root of 131031145 is about 507.9155534191.

Adding to 131031145 its reverse (541130131), we get a palindrome (672161276).

The spelling of 131031145 in words is "one hundred thirty-one million, thirty-one thousand, one hundred forty-five".