421711031 has 16 divisors (see below), whose sum is σ = 486077760. Its totient is φ = 358391040.

The previous prime is 421711021. The next prime is 421711033. The reversal of 421711031 is 130117124.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-421711031 is a prime.

It is a super-2 number, since 2×421711031² = 355680387334165922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421710994 and 421711012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421711033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528725 + ... + 529521.

It is an arithmetic number, because the mean of its divisors is an integer number (30379860).

Almost surely, 2^421711031 is an apocalyptic number.

421711031 is a deficient number, since it is larger than the sum of its proper divisors (64366729).

421711031 is a wasteful number, since it uses less digits than its factorization.

421711031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 421711031 is about 20535.6039843000. The cubic root of 421711031 is about 749.9028205939.

Adding to 421711031 its reverse (130117124), we get a palindrome (551828155).

The spelling of 421711031 in words is "four hundred twenty-one million, seven hundred eleven thousand, thirty-one".