2139247580 has 12 divisors (see below), whose sum is σ = 4492419960. Its totient is φ = 855699024.

The previous prime is 2139247577. The next prime is 2139247609. The reversal of 2139247580 is 857429312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53481170 + ... + 53481209.

It is an arithmetic number, because the mean of its divisors is an integer number (374368330).

Almost surely, 2^2139247580 is an apocalyptic number.

2139247580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2139247580 is an abundant number, since it is smaller than the sum of its proper divisors (2353172380).

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

2139247580 is a wasteful number, since it uses less digits than its factorization.

2139247580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106962388 (or 106962386 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 2139247580 is about 46252.0008215861. Note that the first 3 decimals coincide. The cubic root of 2139247580 is about 1288.5076948363.

The spelling of 2139247580 in words is "two billion, one hundred thirty-nine million, two hundred forty-seven thousand, five hundred eighty".