64212455 has 4 divisors (see below), whose sum is σ = 77054952. Its totient is φ = 51369960.

The previous prime is 64212403. The next prime is 64212461. The reversal of 64212455 is 55421246.

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

It is not a de Polignac number, because 64212455 - 2¹² = 64208359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6421241 + ... + 6421250.

It is an arithmetic number, because the mean of its divisors is an integer number (19263738).

Almost surely, 2^64212455 is an apocalyptic number.

64212455 is a deficient number, since it is larger than the sum of its proper divisors (12842497).

64212455 is a wasteful number, since it uses less digits than its factorization.

64212455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12842496.

The product of its digits is 9600, while the sum is 29.

The square root of 64212455 is about 8013.2674359465. The cubic root of 64212455 is about 400.4421257154.

The spelling of 64212455 in words is "sixty-four million, two hundred twelve thousand, four hundred fifty-five".