421731164 has 6 divisors (see below), whose sum is σ = 738029544. Its totient is φ = 210865580.

The previous prime is 421731157. The next prime is 421731173. The reversal of 421731164 is 461137124.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52716392 + ... + 52716399.

It is an arithmetic number, because the mean of its divisors is an integer number (123004924).

Almost surely, 2^421731164 is an apocalyptic number.

It is an amenable number.

421731164 is a deficient number, since it is larger than the sum of its proper divisors (316298380).

421731164 is a wasteful number, since it uses less digits than its factorization.

421731164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105432795 (or 105432793 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 421731164 is about 20536.0941758651. The cubic root of 421731164 is about 749.9147541631.

Adding to 421731164 its reverse (461137124), we get a palindrome (882868288).

The spelling of 421731164 in words is "four hundred twenty-one million, seven hundred thirty-one thousand, one hundred sixty-four".