2455421220 has 72 divisors (see below), whose sum is σ = 8512131264. Its totient is φ = 561238848.

The previous prime is 2455421219. The next prime is 2455421233. The reversal of 2455421220 is 221245542.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 973114 + ... + 975633.

Almost surely, 2^2455421220 is an apocalyptic number.

2455421220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2455421220 is an abundant number, since it is smaller than the sum of its proper divisors (6056710044).

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

2455421220 is a wasteful number, since it uses less digits than its factorization.

2455421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948769 (or 1948764 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2455421220 is about 49552.2070144207. The cubic root of 2455421220 is about 1349.0933500847.

Adding to 2455421220 its reverse (221245542), we get a palindrome (2676666762).

The spelling of 2455421220 in words is "two billion, four hundred fifty-five million, four hundred twenty-one thousand, two hundred twenty".