2154437500 has 42 divisors (see below), whose sum is σ = 4712908424. Its totient is φ = 861750000.

The previous prime is 2154437491. The next prime is 2154437501. The reversal of 2154437500 is 57344512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154437501) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 45265 + ... + 79735.

Almost surely, 2^2154437500 is an apocalyptic number.

2154437500 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 2154437500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2356454212).

2154437500 is an abundant number, since it is smaller than the sum of its proper divisors (2558470924).

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

2154437500 is an frugal number, since it uses more digits than its factorization.

2154437500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34505 (or 34478 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 2154437500 is about 46415.9186055819. The cubic root of 2154437500 is about 1291.5502265252.

The spelling of 2154437500 in words is "two billion, one hundred fifty-four million, four hundred thirty-seven thousand, five hundred".