1225155311 has 2 divisors, whose sum is σ = 1225155312. Its totient is φ = 1225155310.

The previous prime is 1225155307. The next prime is 1225155383. The reversal of 1225155311 is 1135515221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225155311 - 2² = 1225155307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225175311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612577655 + 612577656.

It is an arithmetic number, because the mean of its divisors is an integer number (612577656).

Almost surely, 2^1225155311 is an apocalyptic number.

1225155311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225155311 is an equidigital number, since it uses as much as digits as its factorization.

1225155311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 26.

The square root of 1225155311 is about 35002.2186582508. The cubic root of 1225155311 is about 1070.0326979265.

The spelling of 1225155311 in words is "one billion, two hundred twenty-five million, one hundred fifty-five thousand, three hundred eleven".