64244431 has 8 divisors (see below), whose sum is σ = 66420224. Its totient is φ = 62075160.

The previous prime is 64244423. The next prime is 64244461. The reversal of 64244431 is 13444246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64244431 - 2³ = 64244423 is a prime.

It is a super-2 number, since 2×64244431² = 8254693829027522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64244431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64244461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26200 + ... + 28546.

It is an arithmetic number, because the mean of its divisors is an integer number (8302528).

Almost surely, 2^64244431 is an apocalyptic number.

64244431 is a deficient number, since it is larger than the sum of its proper divisors (2175793).

64244431 is a wasteful number, since it uses less digits than its factorization.

64244431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261.

The product of its digits is 9216, while the sum is 28.

The square root of 64244431 is about 8015.2623787372. The cubic root of 64244431 is about 400.5085843309.

Adding to 64244431 its reverse (13444246), we get a palindrome (77688677).

The spelling of 64244431 in words is "sixty-four million, two hundred forty-four thousand, four hundred thirty-one".