215250000 has 280 divisors, whose sum is σ = 813739584. Its totient is φ = 48000000.

The previous prime is 215249987. The next prime is 215250001. The reversal of 215250000 is 52512.

It is a tau number, because it is divible by the number of its divisors (280).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215250001) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 5249980 + ... + 5250020.

Almost surely, 2^215250000 is an apocalyptic number.

215250000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406869792).

215250000 is an abundant number, since it is smaller than the sum of its proper divisors (598489584).

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

215250000 is an frugal number, since it uses more digits than its factorization.

215250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 215250000 is about 14671.4007511212. The cubic root of 215250000 is about 599.3047502464.

It can be divided in two parts, 21 and 5250000, that multiplied together give a square (110250000 = 10500²).

The spelling of 215250000 in words is "two hundred fifteen million, two hundred fifty thousand".