64454215 has 16 divisors (see below), whose sum is σ = 88619328. Its totient is φ = 44084736.

The previous prime is 64454179. The next prime is 64454219. The reversal of 64454215 is 51245446.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64454215 - 2²⁵ = 30899783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64454219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13029 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (5538708).

Almost surely, 2^64454215 is an apocalyptic number.

64454215 is a deficient number, since it is larger than the sum of its proper divisors (24165113).

64454215 is a wasteful number, since it uses less digits than its factorization.

64454215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698.

The product of its digits is 19200, while the sum is 31.

The square root of 64454215 is about 8028.3382464866. The cubic root of 64454215 is about 400.9440514145.

The spelling of 64454215 in words is "sixty-four million, four hundred fifty-four thousand, two hundred fifteen".