64623251 has 16 divisors (see below), whose sum is σ = 83171328. Its totient is φ = 48729600.

The previous prime is 64623197. The next prime is 64623259. The reversal of 64623251 is 15232646.

64623251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64623251 - 2²² = 60428947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64623259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11150 + ... + 15923.

It is an arithmetic number, because the mean of its divisors is an integer number (5198208).

Almost surely, 2^64623251 is an apocalyptic number.

64623251 is a deficient number, since it is larger than the sum of its proper divisors (18548077).

64623251 is a wasteful number, since it uses less digits than its factorization.

64623251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27122.

The product of its digits is 8640, while the sum is 29.

The square root of 64623251 is about 8038.8588120454. The cubic root of 64623251 is about 401.2942473761.

Adding to 64623251 its reverse (15232646), we get a palindrome (79855897).

The spelling of 64623251 in words is "sixty-four million, six hundred twenty-three thousand, two hundred fifty-one".