3131012340 has 96 divisors (see below), whose sum is σ = 9874488960. Its totient is φ = 823488768.

The previous prime is 3131012329. The next prime is 3131012341. The reversal of 3131012340 is 432101313.

3131012340 is a `hidden beast` number, since 3 + 1 + 310 + 12 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131012341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294 + ... + 79133.

It is an arithmetic number, because the mean of its divisors is an integer number (102859260).

Almost surely, 2^3131012340 is an apocalyptic number.

3131012340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3131012340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4937244480).

3131012340 is an abundant number, since it is smaller than the sum of its proper divisors (6743476620).

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

3131012340 is a wasteful number, since it uses less digits than its factorization.

3131012340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79518 (or 79510 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3131012340 is about 55955.4496005528. The cubic root of 3131012340 is about 1462.9458785135.

Adding to 3131012340 its reverse (432101313), we get a palindrome (3563113653).

The spelling of 3131012340 in words is "three billion, one hundred thirty-one million, twelve thousand, three hundred forty".