3131131000 has 64 divisors (see below), whose sum is σ = 7497341280. Its totient is φ = 1223308800.

The previous prime is 3131130991. The next prime is 3131131001. The reversal of 3131131000 is 1311313.

It is a happy number.

It is a super-2 number, since 2×3131131000² = 19607962678322000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131131001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6592 + ... + 79408.

Almost surely, 2^3131131000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3131131000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3748670640).

3131131000 is an abundant number, since it is smaller than the sum of its proper divisors (4366210280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3131131000 is a wasteful number, since it uses less digits than its factorization.

3131131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72881 (or 72867 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 3131131000 is about 55956.5098983130. The cubic root of 3131131000 is about 1462.9643593270.

Adding to 3131131000 its reverse (1311313), we get a palindrome (3132442313).

The spelling of 3131131000 in words is "three billion, one hundred thirty-one million, one hundred thirty-one thousand".