2156501200 has 60 divisors (see below), whose sum is σ = 5921143840. Its totient is φ = 739370880.

The previous prime is 2156501189. The next prime is 2156501201. The reversal of 2156501200 is 21056512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156501201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 382290 + ... + 387889.

Almost surely, 2^2156501200 is an apocalyptic number.

2156501200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156501200 is an abundant number, since it is smaller than the sum of its proper divisors (3764642640).

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

2156501200 is a wasteful number, since it uses less digits than its factorization.

2156501200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770204 (or 770193 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2156501200 is about 46438.1438044201. The cubic root of 2156501200 is about 1291.9624797802.

Adding to 2156501200 its reverse (21056512), we get a palindrome (2177557712).

The spelling of 2156501200 in words is "two billion, one hundred fifty-six million, five hundred one thousand, two hundred".