220215525 has 12 divisors (see below), whose sum is σ = 364089792. Its totient is φ = 117448240.

The previous prime is 220215487. The next prime is 220215557. The reversal of 220215525 is 525512022.

It is not a de Polignac number, because 220215525 - 2⁶ = 220215461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220215495 and 220215504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1468029 + ... + 1468178.

It is an arithmetic number, because the mean of its divisors is an integer number (30340816).

Almost surely, 2^220215525 is an apocalyptic number.

220215525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220215525 is a deficient number, since it is larger than the sum of its proper divisors (143874267).

220215525 is a wasteful number, since it uses less digits than its factorization.

220215525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936220 (or 2936215 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 220215525 is about 14839.6605419396. The cubic root of 220215525 is about 603.8781432241.

Adding to 220215525 its reverse (525512022), we get a palindrome (745727547).

The spelling of 220215525 in words is "two hundred twenty million, two hundred fifteen thousand, five hundred twenty-five".