2172613240 has 64 divisors (see below), whose sum is σ = 5591232000. Its totient is φ = 744294528.

The previous prime is 2172613231. The next prime is 2172613291. The reversal of 2172613240 is 423162712.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 2172613199 and 2172613208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473437 + ... + 478003.

It is an arithmetic number, because the mean of its divisors is an integer number (87363000).

Almost surely, 2^2172613240 is an apocalyptic number.

2172613240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172613240 is an abundant number, since it is smaller than the sum of its proper divisors (3418618760).

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

2172613240 is a wasteful number, since it uses less digits than its factorization.

2172613240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284 (or 6280 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 2172613240 is about 46611.2994884288. The cubic root of 2172613240 is about 1295.1720805103.

Adding to 2172613240 its reverse (423162712), we get a palindrome (2595775952).

The spelling of 2172613240 in words is "two billion, one hundred seventy-two million, six hundred thirteen thousand, two hundred forty".