31132131 has 8 divisors (see below), whose sum is σ = 41576640. Its totient is φ = 20721192.

The previous prime is 31132103. The next prime is 31132141. The reversal of 31132131 is 13123113.

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

It is not a de Polignac number, because 31132131 - 2⁶ = 31132067 is a prime.

It is a super-2 number, since 2×31132131² = 1938419161202322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31132131.

It is not an unprimeable number, because it can be changed into a prime (31132141) 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, 6141 + ... + 9998.

It is an arithmetic number, because the mean of its divisors is an integer number (5197080).

Almost surely, 2^31132131 is an apocalyptic number.

31132131 is a deficient number, since it is larger than the sum of its proper divisors (10444509).

31132131 is a wasteful number, since it uses less digits than its factorization.

31132131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16785.

The product of its digits is 54, while the sum is 15.

The square root of 31132131 is about 5579.6174600057. The cubic root of 31132131 is about 314.5837485056.

Adding to 31132131 its reverse (13123113), we get a palindrome (44255244).

The spelling of 31132131 in words is "thirty-one million, one hundred thirty-two thousand, one hundred thirty-one".