1064431221 has 32 divisors (see below), whose sum is σ = 1680949248. Its totient is φ = 586293120.

The previous prime is 1064431201. The next prime is 1064431229. The reversal of 1064431221 is 1221344601.

It is not a de Polignac number, because 1064431221 - 2⁶ = 1064431157 is a prime.

It is a super-2 number, since 2×1064431221² = 2266027648479101682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1064431191 and 1064431200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1064431229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168105 + ... + 174321.

It is an arithmetic number, because the mean of its divisors is an integer number (52529664).

Almost surely, 2^1064431221 is an apocalyptic number.

It is an amenable number.

1064431221 is a deficient number, since it is larger than the sum of its proper divisors (616518027).

1064431221 is a wasteful number, since it uses less digits than its factorization.

1064431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1064431221 is about 32625.6221549873. The cubic root of 1064431221 is about 1021.0316426967.

Adding to 1064431221 its reverse (1221344601), we get a palindrome (2285775822).

The spelling of 1064431221 in words is "one billion, sixty-four million, four hundred thirty-one thousand, two hundred twenty-one".