215254530 has 128 divisors (see below), whose sum is σ = 610675200. Its totient is φ = 53851392.

The previous prime is 215254513. The next prime is 215254531. The reversal of 215254530 is 35452512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 215254494 and 215254503.

It is not an unprimeable number, because it can be changed into a prime (215254531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 289339 + ... + 290081.

It is an arithmetic number, because the mean of its divisors is an integer number (4770900).

Almost surely, 2^215254530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215254530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305337600).

215254530 is an abundant number, since it is smaller than the sum of its proper divisors (395420670).

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

215254530 is a wasteful number, since it uses less digits than its factorization.

215254530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 215254530 is about 14671.5551322960. Note that the first 3 decimals coincide. The cubic root of 215254530 is about 599.3089543989.

The spelling of 215254530 in words is "two hundred fifteen million, two hundred fifty-four thousand, five hundred thirty".