215201400 has 48 divisors (see below), whose sum is σ = 667126200. Its totient is φ = 57386880.

The previous prime is 215201347. The next prime is 215201401. The reversal of 215201400 is 4102512.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 215201400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215201401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178735 + ... + 179934.

Almost surely, 2^215201400 is an apocalyptic number.

215201400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215201400 is an abundant number, since it is smaller than the sum of its proper divisors (451924800).

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

215201400 is a wasteful number, since it uses less digits than its factorization.

215201400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358688 (or 358679 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 215201400 is about 14669.7443740510. The cubic root of 215201400 is about 599.2596423823.

Adding to 215201400 its reverse (4102512), we get a palindrome (219303912).

The spelling of 215201400 in words is "two hundred fifteen million, two hundred one thousand, four hundred".