2157149730 has 16 divisors (see below), whose sum is σ = 5177159424. Its totient is φ = 575239920.

The previous prime is 2157149723. The next prime is 2157149749. The reversal of 2157149730 is 379417512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35952466 + ... + 35952525.

It is an arithmetic number, because the mean of its divisors is an integer number (323572464).

Almost surely, 2^2157149730 is an apocalyptic number.

2157149730 is an abundant number, since it is smaller than the sum of its proper divisors (3020009694).

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

2157149730 is a wasteful number, since it uses less digits than its factorization.

2157149730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71905001.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 2157149730 is about 46445.1260090873. The cubic root of 2157149730 is about 1292.0919785023.

The spelling of 2157149730 in words is "two billion, one hundred fifty-seven million, one hundred forty-nine thousand, seven hundred thirty".