421031519 has 2 divisors, whose sum is σ = 421031520. Its totient is φ = 421031518.

The previous prime is 421031477. The next prime is 421031531. The reversal of 421031519 is 915130124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421031519 - 2⁸ = 421031263 is a prime.

It is a super-2 number, since 2×421031519² = 354535079982894722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421031539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210515759 + 210515760.

It is an arithmetic number, because the mean of its divisors is an integer number (210515760).

Almost surely, 2^421031519 is an apocalyptic number.

421031519 is a deficient number, since it is larger than the sum of its proper divisors (1).

421031519 is an equidigital number, since it uses as much as digits as its factorization.

421031519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 421031519 is about 20519.0525853413. The cubic root of 421031519 is about 749.4998259161.

The spelling of 421031519 in words is "four hundred twenty-one million, thirty-one thousand, five hundred nineteen".