421351431 has 8 divisors (see below), whose sum is σ = 572402160. Its totient is φ = 275600832.

The previous prime is 421351423. The next prime is 421351439. The reversal of 421351431 is 134153124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421351423) and next prime (421351439).

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

It is not a de Polignac number, because 421351431 - 2³ = 421351423 is a prime.

It is a super-2 number, since 2×421351431² = 355074056811495522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421351439) 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, 1324846 + ... + 1325163.

It is an arithmetic number, because the mean of its divisors is an integer number (71550270).

Almost surely, 2^421351431 is an apocalyptic number.

421351431 is a deficient number, since it is larger than the sum of its proper divisors (151050729).

421351431 is a wasteful number, since it uses less digits than its factorization.

421351431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650065.

The product of its digits is 1440, while the sum is 24.

The square root of 421351431 is about 20526.8465917198. The cubic root of 421351431 is about 749.6896084494.

The spelling of 421351431 in words is "four hundred twenty-one million, three hundred fifty-one thousand, four hundred thirty-one".