215102064 has 20 divisors (see below), whose sum is σ = 555680456. Its totient is φ = 71700672.

The previous prime is 215102057. The next prime is 215102101. The reversal of 215102064 is 460201512.

It is a self number, because there is not a number n which added to its sum of digits gives 215102064.

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, 2240599 + ... + 2240694.

Almost surely, 2^215102064 is an apocalyptic number.

215102064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

215102064 is an abundant number, since it is smaller than the sum of its proper divisors (340578392).

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

215102064 is a wasteful number, since it uses less digits than its factorization.

215102064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481304 (or 4481298 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 215102064 is about 14666.3582391813. The cubic root of 215102064 is about 599.1674230047.

Adding to 215102064 its reverse (460201512), we get a palindrome (675303576).

The spelling of 215102064 in words is "two hundred fifteen million, one hundred two thousand, sixty-four".