1222515143 has 2 divisors, whose sum is σ = 1222515144. Its totient is φ = 1222515142.

The previous prime is 1222515139. The next prime is 1222515149. The reversal of 1222515143 is 3415152221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222515143 - 2² = 1222515139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222515149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611257571 + 611257572.

It is an arithmetic number, because the mean of its divisors is an integer number (611257572).

Almost surely, 2^1222515143 is an apocalyptic number.

1222515143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222515143 is an equidigital number, since it uses as much as digits as its factorization.

1222515143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 1222515143 is about 34964.4840230769. The cubic root of 1222515143 is about 1069.2635171261.

Adding to 1222515143 its reverse (3415152221), we get a palindrome (4637667364).

The spelling of 1222515143 in words is "one billion, two hundred twenty-two million, five hundred fifteen thousand, one hundred forty-three".