420158831 has 2 divisors, whose sum is σ = 420158832. Its totient is φ = 420158830.

The previous prime is 420158801. The next prime is 420158833. The reversal of 420158831 is 138851024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420158831 - 2¹⁰ = 420157807 is a prime.

It is a super-2 number, since 2×420158831² = 353066886534573122, which contains 22 as substring.

Together with 420158833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420158833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210079415 + 210079416.

It is an arithmetic number, because the mean of its divisors is an integer number (210079416).

Almost surely, 2^420158831 is an apocalyptic number.

420158831 is a deficient number, since it is larger than the sum of its proper divisors (1).

420158831 is an equidigital number, since it uses as much as digits as its factorization.

420158831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 420158831 is about 20497.7762452418. The cubic root of 420158831 is about 748.9816288157.

The spelling of 420158831 in words is "four hundred twenty million, one hundred fifty-eight thousand, eight hundred thirty-one".