2157950 has 12 divisors (see below), whose sum is σ = 4013880. Its totient is φ = 863160.

The previous prime is 2157923. The next prime is 2157989. The reversal of 2157950 is 597512.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 21530 + ... + 21629.

It is an arithmetic number, because the mean of its divisors is an integer number (334490).

2^2157950 is an apocalyptic number.

2157950 is a deficient number, since it is larger than the sum of its proper divisors (1855930).

2157950 is a wasteful number, since it uses less digits than its factorization.

2157950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43171 (or 43166 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 2157950 is about 1468.9962559517. The cubic root of 2157950 is about 129.2251740957.

The spelling of 2157950 in words is "two million, one hundred fifty-seven thousand, nine hundred fifty".