220123451 has 2 divisors, whose sum is σ = 220123452. Its totient is φ = 220123450.

The previous prime is 220123411. The next prime is 220123457. The reversal of 220123451 is 154321022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220123451 - 2¹⁸ = 219861307 is a prime.

It is not a weakly prime, because it can be changed into another prime (220123457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110061725 + 110061726.

It is an arithmetic number, because the mean of its divisors is an integer number (110061726).

Almost surely, 2^220123451 is an apocalyptic number.

220123451 is a deficient number, since it is larger than the sum of its proper divisors (1).

220123451 is an equidigital number, since it uses as much as digits as its factorization.

220123451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 220123451 is about 14836.5579229146. The cubic root of 220123451 is about 603.7939692811.

Adding to 220123451 its reverse (154321022), we get a palindrome (374444473).

It can be divided in two parts, 2201 and 23451, that added together give a palindrome (25652).

The spelling of 220123451 in words is "two hundred twenty million, one hundred twenty-three thousand, four hundred fifty-one".