1612312131 has 4 divisors (see below), whose sum is σ = 2149749512. Its totient is φ = 1074874752.

The previous prime is 1612312123. The next prime is 1612312151. The reversal of 1612312131 is 1312132161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312132161 = 3 ⋅437377387.

It is not a de Polignac number, because 1612312131 - 2³ = 1612312123 is a prime.

It is a super-2 number, since 2×1612312131² = 5199100815539522322, 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 = 1612312098 and 1612312107.

It is not an unprimeable number, because it can be changed into a prime (1612312151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268718686 + ... + 268718691.

It is an arithmetic number, because the mean of its divisors is an integer number (537437378).

Almost surely, 2^1612312131 is an apocalyptic number.

1612312131 is a deficient number, since it is larger than the sum of its proper divisors (537437381).

1612312131 is an equidigital number, since it uses as much as digits as its factorization.

1612312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537437380.

The product of its digits is 216, while the sum is 21.

The square root of 1612312131 is about 40153.6066997723. The cubic root of 1612312131 is about 1172.5995068629.

Adding to 1612312131 its reverse (1312132161), we get a palindrome (2924444292).

The spelling of 1612312131 in words is "one billion, six hundred twelve million, three hundred twelve thousand, one hundred thirty-one".