1185222551 has 2 divisors, whose sum is σ = 1185222552. Its totient is φ = 1185222550.

The previous prime is 1185222539. The next prime is 1185222553. The reversal of 1185222551 is 1552225811.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1185222551 is a prime.

Together with 1185222553, 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 (1185222553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592611275 + 592611276.

It is an arithmetic number, because the mean of its divisors is an integer number (592611276).

Almost surely, 2^1185222551 is an apocalyptic number.

1185222551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185222551 is an equidigital number, since it uses as much as digits as its factorization.

1185222551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8000, while the sum is 32.

The square root of 1185222551 is about 34427.0613180968. The cubic root of 1185222551 is about 1058.2784893370.

The spelling of 1185222551 in words is "one billion, one hundred eighty-five million, two hundred twenty-two thousand, five hundred fifty-one".