220658431 has 4 divisors (see below), whose sum is σ = 252181072. Its totient is φ = 189135792.

The previous prime is 220658429. The next prime is 220658441. The reversal of 220658431 is 134856022.

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

It is a cyclic number.

It is not a de Polignac number, because 220658431 - 2¹ = 220658429 is a prime.

It is a super-2 number, since 2×220658431² = 97380286342763522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220658393 and 220658402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220658441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15761310 + ... + 15761323.

It is an arithmetic number, because the mean of its divisors is an integer number (63045268).

Almost surely, 2^220658431 is an apocalyptic number.

220658431 is a deficient number, since it is larger than the sum of its proper divisors (31522641).

220658431 is an equidigital number, since it uses as much as digits as its factorization.

220658431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31522640.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 220658431 is about 14854.5760962742. The cubic root of 220658431 is about 604.2827198216.

The spelling of 220658431 in words is "two hundred twenty million, six hundred fifty-eight thousand, four hundred thirty-one".