2154402520 has 96 divisors (see below), whose sum is σ = 5178304080. Its totient is φ = 806512640.

The previous prime is 2154402493. The next prime is 2154402529. The reversal of 2154402520 is 252044512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154402529) 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, 2623710 + ... + 2624530.

Almost surely, 2^2154402520 is an apocalyptic number.

2154402520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154402520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589152040).

2154402520 is an abundant number, since it is smaller than the sum of its proper divisors (3023901560).

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

2154402520 is a wasteful number, since it uses less digits than its factorization.

2154402520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2154402520 is about 46415.5417936708. The cubic root of 2154402520 is about 1291.5432365071.

The spelling of 2154402520 in words is "two billion, one hundred fifty-four million, four hundred two thousand, five hundred twenty".