2100401240 has 32 divisors (see below), whose sum is σ = 5401032480. Its totient is φ = 720137472.

The previous prime is 2100401209. The next prime is 2100401243. The reversal of 2100401240 is 421040012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100401243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3750437 + ... + 3750996.

It is an arithmetic number, because the mean of its divisors is an integer number (168782265).

Almost surely, 2^2100401240 is an apocalyptic number.

2100401240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100401240 is an abundant number, since it is smaller than the sum of its proper divisors (3300631240).

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

2100401240 is a wasteful number, since it uses less digits than its factorization.

2100401240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7501451 (or 7501447 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2100401240 is about 45830.1346277752. The cubic root of 2100401240 is about 1280.6607184578.

Adding to 2100401240 its reverse (421040012), we get a palindrome (2521441252).

The spelling of 2100401240 in words is "two billion, one hundred million, four hundred one thousand, two hundred forty".