2154021430 has 48 divisors (see below), whose sum is σ = 4321955232. Its totient is φ = 772217600.

The previous prime is 2154021413. The next prime is 2154021433. The reversal of 2154021430 is 341204512.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154021433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73374 + ... + 98446.

It is an arithmetic number, because the mean of its divisors is an integer number (90040734).

Almost surely, 2^2154021430 is an apocalyptic number.

2154021430 is an abundant number, since it is smaller than the sum of its proper divisors (2167933802).

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

2154021430 is a wasteful number, since it uses less digits than its factorization.

2154021430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25173 (or 25162 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2154021430 is about 46411.4364138840. The cubic root of 2154021430 is about 1291.4670787740.

Adding to 2154021430 its reverse (341204512), we get a palindrome (2495225942).

The spelling of 2154021430 in words is "two billion, one hundred fifty-four million, twenty-one thousand, four hundred thirty".