2154156330 has 64 divisors (see below), whose sum is σ = 5256638208. Its totient is φ = 564856320.

The previous prime is 2154156247. The next prime is 2154156341. The reversal of 2154156330 is 336514512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 972304 + ... + 974516.

It is an arithmetic number, because the mean of its divisors is an integer number (82134972).

Almost surely, 2^2154156330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154156330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2628319104).

2154156330 is an abundant number, since it is smaller than the sum of its proper divisors (3102481878).

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

2154156330 is a wasteful number, since it uses less digits than its factorization.

2154156330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2154156330 is about 46412.8896967211. The cubic root of 2154156330 is about 1291.4940384674.

The spelling of 2154156330 in words is "two billion, one hundred fifty-four million, one hundred fifty-six thousand, three hundred thirty".