220123951 has 2 divisors, whose sum is σ = 220123952. Its totient is φ = 220123950.

The previous prime is 220123933. The next prime is 220124033. The reversal of 220123951 is 159321022.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220123951 - 2⁵ = 220123919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220123921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110061975 + 110061976.

It is an arithmetic number, because the mean of its divisors is an integer number (110061976).

Almost surely, 2^220123951 is an apocalyptic number.

220123951 is a deficient number, since it is larger than the sum of its proper divisors (1).

220123951 is an equidigital number, since it uses as much as digits as its factorization.

220123951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 220123951 is about 14836.5747731746. The cubic root of 220123951 is about 603.7944264439.

Adding to 220123951 its reverse (159321022), we get a palindrome (379444973).

The spelling of 220123951 in words is "two hundred twenty million, one hundred twenty-three thousand, nine hundred fifty-one".