220513131 has 16 divisors (see below), whose sum is σ = 327078400. Its totient is φ = 146832264.

The previous prime is 220513127. The next prime is 220513133. The reversal of 220513131 is 131315022.

220513131 is a `hidden beast` number, since 2 + 20 + 513 + 131 = 666.

220513131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220513131 - 2² = 220513127 is a prime.

It is a super-2 number, since 2×220513131² = 97252081886846322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220513133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20370 + ... + 29256.

It is an arithmetic number, because the mean of its divisors is an integer number (20442400).

Almost surely, 2^220513131 is an apocalyptic number.

220513131 is a deficient number, since it is larger than the sum of its proper divisors (106565269).

220513131 is an equidigital number, since it uses as much as digits as its factorization.

220513131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9815 (or 9809 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 220513131 is about 14849.6845421039. The cubic root of 220513131 is about 604.1500539060.

Adding to 220513131 its reverse (131315022), we get a palindrome (351828153).

The spelling of 220513131 in words is "two hundred twenty million, five hundred thirteen thousand, one hundred thirty-one".