220949131 has 4 divisors (see below), whose sum is σ = 237945232. Its totient is φ = 203953032.

The previous prime is 220949129. The next prime is 220949143. The reversal of 220949131 is 131949022.

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 220949131 - 2¹ = 220949129 is a prime.

It is a super-2 number, since 2×220949131² = 97637036979310322, 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 = 220949093 and 220949102.

It is not an unprimeable number, because it can be changed into a prime (220949191) 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, 8498031 + ... + 8498056.

It is an arithmetic number, because the mean of its divisors is an integer number (59486308).

Almost surely, 2^220949131 is an apocalyptic number.

220949131 is a deficient number, since it is larger than the sum of its proper divisors (16996101).

220949131 is a wasteful number, since it uses less digits than its factorization.

220949131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16996100.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 220949131 is about 14864.3577392365. The cubic root of 220949131 is about 604.5479682431.

The spelling of 220949131 in words is "two hundred twenty million, nine hundred forty-nine thousand, one hundred thirty-one".