2154220530 has 64 divisors (see below), whose sum is σ = 6445882368. Its totient is φ = 447629760.

The previous prime is 2154220529. The next prime is 2154220547. The reversal of 2154220530 is 350224512.

It is a self number, because there is not a number n which added to its sum of digits gives 2154220530.

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, 463972 + ... + 468591.

It is an arithmetic number, because the mean of its divisors is an integer number (100716912).

Almost surely, 2^2154220530 is an apocalyptic number.

2154220530 is an abundant number, since it is smaller than the sum of its proper divisors (4291661838).

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

2154220530 is a wasteful number, since it uses less digits than its factorization.

2154220530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932591.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2154220530 is about 46413.5813097847. The cubic root of 2154220530 is about 1291.5068684081.

The spelling of 2154220530 in words is "two billion, one hundred fifty-four million, two hundred twenty thousand, five hundred thirty".