215454064 has 40 divisors (see below), whose sum is σ = 497825280. Its totient is φ = 88321728.

The previous prime is 215454059. The next prime is 215454067. The reversal of 215454064 is 460454512.

It is a happy number.

215454064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215454067) 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, 39244 + ... + 44395.

It is an arithmetic number, because the mean of its divisors is an integer number (12445632).

Almost surely, 2^215454064 is an apocalyptic number.

It is an amenable number.

215454064 is an abundant number, since it is smaller than the sum of its proper divisors (282371216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215454064 is a wasteful number, since it uses less digits than its factorization.

215454064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83677 (or 83671 counting only the distinct ones).

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

The square root of 215454064 is about 14678.3535861486. The cubic root of 215454064 is about 599.4940772272.

The spelling of 215454064 in words is "two hundred fifteen million, four hundred fifty-four thousand, sixty-four".