220125551 has 2 divisors, whose sum is σ = 220125552. Its totient is φ = 220125550.

The previous prime is 220125547. The next prime is 220125599. The reversal of 220125551 is 155521022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220125551 - 2² = 220125547 is a prime.

It is a super-3 number, since 3×220125551³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220125511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110062775 + 110062776.

It is an arithmetic number, because the mean of its divisors is an integer number (110062776).

Almost surely, 2^220125551 is an apocalyptic number.

220125551 is a deficient number, since it is larger than the sum of its proper divisors (1).

220125551 is an equidigital number, since it uses as much as digits as its factorization.

220125551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 220125551 is about 14836.6286938779. The cubic root of 220125551 is about 603.7958893602.

Adding to 220125551 its reverse (155521022), we get a palindrome (375646573).

The spelling of 220125551 in words is "two hundred twenty million, one hundred twenty-five thousand, five hundred fifty-one".