2122545400 has 48 divisors (see below), whose sum is σ = 5055301440. Its totient is φ = 828307200.

The previous prime is 2122545371. The next prime is 2122545407. The reversal of 2122545400 is 45452212.

It is a super-2 number, since 2×2122545400² = 9010397950122320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122545407) 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, 121224 + ... + 137623.

It is an arithmetic number, because the mean of its divisors is an integer number (105318780).

Almost surely, 2^2122545400 is an apocalyptic number.

2122545400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122545400 is an abundant number, since it is smaller than the sum of its proper divisors (2932756040).

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

2122545400 is a wasteful number, since it uses less digits than its factorization.

2122545400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258904 (or 258895 counting only the distinct ones).

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

The square root of 2122545400 is about 46071.0907185840. The cubic root of 2122545400 is about 1285.1455875259.

Adding to 2122545400 its reverse (45452212), we get a palindrome (2167997612).

The spelling of 2122545400 in words is "two billion, one hundred twenty-two million, five hundred forty-five thousand, four hundred".