220400127 has 6 divisors (see below), whose sum is σ = 318355752. Its totient is φ = 146933412.

The previous prime is 220400123. The next prime is 220400143. The reversal of 220400127 is 721004022.

It is not a de Polignac number, because 220400127 - 2² = 220400123 is a prime.

It is a super-2 number, since 2×220400127² = 97152431963232258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220400123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12244443 + ... + 12244460.

It is an arithmetic number, because the mean of its divisors is an integer number (53059292).

Almost surely, 2^220400127 is an apocalyptic number.

220400127 is a deficient number, since it is larger than the sum of its proper divisors (97955625).

220400127 is a wasteful number, since it uses less digits than its factorization.

220400127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24488909 (or 24488906 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 220400127 is about 14845.8791251983. The cubic root of 220400127 is about 604.0468355053.

Adding to 220400127 its reverse (721004022), we get a palindrome (941404149).

The spelling of 220400127 in words is "two hundred twenty million, four hundred thousand, one hundred twenty-seven".