64460215 has 4 divisors (see below), whose sum is σ = 77352264. Its totient is φ = 51568168.

The previous prime is 64460213. The next prime is 64460257. The reversal of 64460215 is 51206446.

64460215 = 2066² + 2067² + ... + 2080².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64460215 - 2¹ = 64460213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64460213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6446017 + ... + 6446026.

It is an arithmetic number, because the mean of its divisors is an integer number (19338066).

Almost surely, 2^64460215 is an apocalyptic number.

64460215 is a deficient number, since it is larger than the sum of its proper divisors (12892049).

64460215 is a wasteful number, since it uses less digits than its factorization.

64460215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12892048.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 64460215 is about 8028.7119141242. The cubic root of 64460215 is about 400.9564922334.

The spelling of 64460215 in words is "sixty-four million, four hundred sixty thousand, two hundred fifteen".