2181420253 has 8 divisors (see below), whose sum is σ = 2203027200. Its totient is φ = 2159888640.

The previous prime is 2181420247. The next prime is 2181420271. The reversal of 2181420253 is 3520241812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2181420253 - 2⁵ = 2181420221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181420053) 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, 40276 + ... + 77362.

It is an arithmetic number, because the mean of its divisors is an integer number (275378400).

Almost surely, 2^2181420253 is an apocalyptic number.

It is an amenable number.

2181420253 is a deficient number, since it is larger than the sum of its proper divisors (21606947).

2181420253 is a wasteful number, since it uses less digits than its factorization.

2181420253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37667.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2181420253 is about 46705.6768819380. The cubic root of 2181420253 is about 1296.9197790842.

The spelling of 2181420253 in words is "two billion, one hundred eighty-one million, four hundred twenty thousand, two hundred fifty-three".