421352831 has 2 divisors, whose sum is σ = 421352832. Its totient is φ = 421352830.

The previous prime is 421352783. The next prime is 421352909. The reversal of 421352831 is 138253124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421352831 - 2¹⁸ = 421090687 is a prime.

It is a super-2 number, since 2×421352831² = 355076416383429122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421352794 and 421352803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421351831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210676415 + 210676416.

It is an arithmetic number, because the mean of its divisors is an integer number (210676416).

Almost surely, 2^421352831 is an apocalyptic number.

421352831 is a deficient number, since it is larger than the sum of its proper divisors (1).

421352831 is an equidigital number, since it uses as much as digits as its factorization.

421352831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 421352831 is about 20526.8806933737. The cubic root of 421352831 is about 749.6904387652.

The spelling of 421352831 in words is "four hundred twenty-one million, three hundred fifty-two thousand, eight hundred thirty-one".