1225527611 has 16 divisors (see below), whose sum is σ = 1530037248. Its totient is φ = 953640000.

The previous prime is 1225527571. The next prime is 1225527661. The reversal of 1225527611 is 1167255221.

It is a cyclic number.

It is not a de Polignac number, because 1225527611 - 2¹⁰ = 1225526587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225527661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47231 + ... + 68423.

It is an arithmetic number, because the mean of its divisors is an integer number (95627328).

Almost surely, 2^1225527611 is an apocalyptic number.

1225527611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1225527611 is a deficient number, since it is larger than the sum of its proper divisors (304509637).

1225527611 is a wasteful number, since it uses less digits than its factorization.

1225527611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21962.

The product of its digits is 8400, while the sum is 32.

The square root of 1225527611 is about 35007.5364885906. The cubic root of 1225527611 is about 1070.1410740711.

The spelling of 1225527611 in words is "one billion, two hundred twenty-five million, five hundred twenty-seven thousand, six hundred eleven".