2157989150 has 24 divisors (see below), whose sum is σ = 4025393400. Its totient is φ = 860715360.

The previous prime is 2157989117. The next prime is 2157989159. The reversal of 2157989150 is 519897512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2157989095 and 2157989104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157989159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44384 + ... + 79283.

It is an arithmetic number, because the mean of its divisors is an integer number (167724725).

Almost surely, 2^2157989150 is an apocalyptic number.

2157989150 is a deficient number, since it is larger than the sum of its proper divisors (1867404250).

2157989150 is a wasteful number, since it uses less digits than its factorization.

2157989150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124028 (or 124023 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 47.

The square root of 2157989150 is about 46454.1618157082. The cubic root of 2157989150 is about 1292.2595556804.

The spelling of 2157989150 in words is "two billion, one hundred fifty-seven million, nine hundred eighty-nine thousand, one hundred fifty".