2157245371 has 32 divisors (see below), whose sum is σ = 2359526400. Its totient is φ = 1967099904.

The previous prime is 2157245369. The next prime is 2157245399. The reversal of 2157245371 is 1735427512.

2157245371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2157245371 - 2¹ = 2157245369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2157245371.

It is not an unprimeable number, because it can be changed into a prime (2157245071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10840330 + ... + 10840528.

It is an arithmetic number, because the mean of its divisors is an integer number (73735200).

Almost surely, 2^2157245371 is an apocalyptic number.

2157245371 is a deficient number, since it is larger than the sum of its proper divisors (202281029).

2157245371 is a wasteful number, since it uses less digits than its factorization.

2157245371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475.

The product of its digits is 58800, while the sum is 37.

The square root of 2157245371 is about 46446.1556105562. The cubic root of 2157245371 is about 1292.1110739381. Note that the first 3 decimals are identical.

The spelling of 2157245371 in words is "two billion, one hundred fifty-seven million, two hundred forty-five thousand, three hundred seventy-one".