2131390926 has 144 divisors (see below), whose sum is σ = 5595557760. Its totient is φ = 583994880.

The previous prime is 2131390879. The next prime is 2131390993. The reversal of 2131390926 is 6290931312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3745570 + ... + 3746138.

It is an arithmetic number, because the mean of its divisors is an integer number (38858040).

Almost surely, 2^2131390926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131390926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2797778880).

2131390926 is an abundant number, since it is smaller than the sum of its proper divisors (3464166834).

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

2131390926 is a wasteful number, since it uses less digits than its factorization.

2131390926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 2131390926 is about 46166.9895704712. The cubic root of 2131390926 is about 1286.9283579894.

The spelling of 2131390926 in words is "two billion, one hundred thirty-one million, three hundred ninety thousand, nine hundred twenty-six".