222515787401 has 2 divisors, whose sum is σ = 222515787402. Its totient is φ = 222515787400.

The previous prime is 222515787367. The next prime is 222515787449. The reversal of 222515787401 is 104787515222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220603999225 + 1911788176 = 469685^2 + 43724^2 .

It is a cyclic number.

It is not a de Polignac number, because 222515787401 - 2¹⁰ = 222515786377 is a prime.

It is not a weakly prime, because it can be changed into another prime (222515784401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111257893700 + 111257893701.

It is an arithmetic number, because the mean of its divisors is an integer number (111257893701).

Almost surely, 2^222515787401 is an apocalyptic number.

It is an amenable number.

222515787401 is a deficient number, since it is larger than the sum of its proper divisors (1).

222515787401 is an equidigital number, since it uses as much as digits as its factorization.

222515787401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313600, while the sum is 44.

The spelling of 222515787401 in words is "two hundred twenty-two billion, five hundred fifteen million, seven hundred eighty-seven thousand, four hundred one".