2157251074 has 32 divisors (see below), whose sum is σ = 3741002496. Its totient is φ = 922072320.

The previous prime is 2157251069. The next prime is 2157251077. The reversal of 2157251074 is 4701527512.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (2157251077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631479 + ... + 634885.

It is an arithmetic number, because the mean of its divisors is an integer number (116906328).

Almost surely, 2^2157251074 is an apocalyptic number.

2157251074 is a deficient number, since it is larger than the sum of its proper divisors (1583751422).

2157251074 is a wasteful number, since it uses less digits than its factorization.

2157251074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 2157251074 is about 46446.2170041867. The cubic root of 2157251074 is about 1292.1122125666.

Adding to 2157251074 its reverse (4701527512), we get a palindrome (6858778586).

The spelling of 2157251074 in words is "two billion, one hundred fifty-seven million, two hundred fifty-one thousand, seventy-four".