2154572394 has 32 divisors (see below), whose sum is σ = 4643775360. Its totient is φ = 662494272.

The previous prime is 2154572383. The next prime is 2154572417. The reversal of 2154572394 is 4932754512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116752 + ... + 133940.

It is an arithmetic number, because the mean of its divisors is an integer number (145117980).

Almost surely, 2^2154572394 is an apocalyptic number.

2154572394 is an abundant number, since it is smaller than the sum of its proper divisors (2489202966).

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

2154572394 is a wasteful number, since it uses less digits than its factorization.

2154572394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18814.

The product of its digits is 302400, while the sum is 42.

The square root of 2154572394 is about 46417.3716834549. The cubic root of 2154572394 is about 1291.5771815487.

It can be divided in two parts, 21545 and 72394, that added together give a palindrome (93939).

The spelling of 2154572394 in words is "two billion, one hundred fifty-four million, five hundred seventy-two thousand, three hundred ninety-four".