1225531079 has 2 divisors, whose sum is σ = 1225531080. Its totient is φ = 1225531078.

The previous prime is 1225531061. The next prime is 1225531093. The reversal of 1225531079 is 9701355221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1225531079 - 2²⁰ = 1224482503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225531009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612765539 + 612765540.

It is an arithmetic number, because the mean of its divisors is an integer number (612765540).

Almost surely, 2^1225531079 is an apocalyptic number.

1225531079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225531079 is an equidigital number, since it uses as much as digits as its factorization.

1225531079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 1225531079 is about 35007.5860207470. The cubic root of 1225531079 is about 1070.1420834992.

It can be divided in two parts, 12255 and 31079, that added together give a palindrome (43334).

The spelling of 1225531079 in words is "one billion, two hundred twenty-five million, five hundred thirty-one thousand, seventy-nine".