421471031 has 4 divisors (see below), whose sum is σ = 421515072. Its totient is φ = 421426992.

The previous prime is 421471027. The next prime is 421471069. The reversal of 421471031 is 130174124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 421471031 - 2² = 421471027 is a prime.

It is a super-2 number, since 2×421471031² = 355275659944405922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421470988 and 421471006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421470031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935 + ... + 29048.

It is an arithmetic number, because the mean of its divisors is an integer number (105378768).

Almost surely, 2^421471031 is an apocalyptic number.

421471031 is a deficient number, since it is larger than the sum of its proper divisors (44041).

421471031 is a wasteful number, since it uses less digits than its factorization.

421471031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44040.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 421471031 is about 20529.7596430158. The cubic root of 421471031 is about 749.7605345128.

The spelling of 421471031 in words is "four hundred twenty-one million, four hundred seventy-one thousand, thirty-one".