1111422551 has 2 divisors, whose sum is σ = 1111422552. Its totient is φ = 1111422550.

The previous prime is 1111422479. The next prime is 1111422553. The reversal of 1111422551 is 1552241111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111422551 is a prime.

It is a Sophie Germain prime.

Together with 1111422553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111422553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555711275 + 555711276.

It is an arithmetic number, because the mean of its divisors is an integer number (555711276).

Almost surely, 2^1111422551 is an apocalyptic number.

1111422551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111422551 is an equidigital number, since it uses as much as digits as its factorization.

1111422551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 23.

The square root of 1111422551 is about 33338.0046043551. The cubic root of 1111422551 is about 1035.8409312258.

Adding to 1111422551 its reverse (1552241111), we get a palindrome (2663663662).

The spelling of 1111422551 in words is "one billion, one hundred eleven million, four hundred twenty-two thousand, five hundred fifty-one".