64503231 has 8 divisors (see below), whose sum is σ = 92620080. Its totient is φ = 39694272.

The previous prime is 64503217. The next prime is 64503251. The reversal of 64503231 is 13230546.

It is a happy number.

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

It is not a de Polignac number, because 64503231 - 2¹¹ = 64501183 is a prime.

It is a super-2 number, since 2×64503231² = 8321333618878722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64503251) 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, 826926 + ... + 827003.

It is an arithmetic number, because the mean of its divisors is an integer number (11577510).

Almost surely, 2^64503231 is an apocalyptic number.

64503231 is a deficient number, since it is larger than the sum of its proper divisors (28116849).

64503231 is a wasteful number, since it uses less digits than its factorization.

64503231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653945.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 64503231 is about 8031.3903528592. The cubic root of 64503231 is about 401.0456620121.

Adding to 64503231 its reverse (13230546), we get a palindrome (77733777).

The spelling of 64503231 in words is "sixty-four million, five hundred three thousand, two hundred thirty-one".