220532251 has 4 divisors (see below), whose sum is σ = 225660952. Its totient is φ = 215403552.

The previous prime is 220532239. The next prime is 220532281. The reversal of 220532251 is 152235022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220532251 is a prime.

It is a super-2 number, since 2×220532251² = 97268947462254002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220532281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564286 + ... + 2564371.

It is an arithmetic number, because the mean of its divisors is an integer number (56415238).

Almost surely, 2^220532251 is an apocalyptic number.

220532251 is a deficient number, since it is larger than the sum of its proper divisors (5128701).

220532251 is an equidigital number, since it uses as much as digits as its factorization.

220532251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128700.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 220532251 is about 14850.3283128690. The cubic root of 220532251 is about 604.1675147183.

Adding to 220532251 its reverse (152235022), we get a palindrome (372767273).

The spelling of 220532251 in words is "two hundred twenty million, five hundred thirty-two thousand, two hundred fifty-one".