3131808142 has 4 divisors (see below), whose sum is σ = 4697712216. Its totient is φ = 1565904070.

The previous prime is 3131808109. The next prime is 3131808143. The reversal of 3131808142 is 2418081313.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×3131808142³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131808143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782952034 + ... + 782952037.

It is an arithmetic number, because the mean of its divisors is an integer number (1174428054).

Almost surely, 2^3131808142 is an apocalyptic number.

3131808142 is a deficient number, since it is larger than the sum of its proper divisors (1565904074).

3131808142 is a wasteful number, since it uses less digits than its factorization.

3131808142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565904073.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 3131808142 is about 55962.5601808924. The cubic root of 3131808142 is about 1463.0698125119.

Adding to 3131808142 its reverse (2418081313), we get a palindrome (5549889455).

The spelling of 3131808142 in words is "three billion, one hundred thirty-one million, eight hundred eight thousand, one hundred forty-two".