421253231 has 8 divisors (see below), whose sum is σ = 482612640. Its totient is φ = 360188928.

The previous prime is 421253221. The next prime is 421253267. The reversal of 421253231 is 132352124.

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 421253231 - 2²² = 417058927 is a prime.

It is a super-2 number, since 2×421253231² = 354908569255878722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421253197 and 421253206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421253221) 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, 70706 + ... + 76431.

It is an arithmetic number, because the mean of its divisors is an integer number (60326580).

Almost surely, 2^421253231 is an apocalyptic number.

421253231 is a deficient number, since it is larger than the sum of its proper divisors (61359409).

421253231 is a wasteful number, since it uses less digits than its factorization.

421253231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147553.

The product of its digits is 1440, while the sum is 23.

The square root of 421253231 is about 20524.4544629084. The cubic root of 421253231 is about 749.6313631351.

The spelling of 421253231 in words is "four hundred twenty-one million, two hundred fifty-three thousand, two hundred thirty-one".