1226615013 has 18 divisors (see below), whose sum is σ = 1918554066. Its totient is φ = 754839072.

The previous prime is 1226615011. The next prime is 1226615021. The reversal of 1226615013 is 3105166221.

1226615013 is a `hidden beast` number, since 12 + 26 + 615 + 0 + 13 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 174715524 + 1051899489 = 13218^2 + 32433^2 .

It is not a de Polignac number, because 1226615013 - 2¹ = 1226615011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226615011) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 401706 + ... + 404747.

It is an arithmetic number, because the mean of its divisors is an integer number (106586337).

Almost surely, 2^1226615013 is an apocalyptic number.

1226615013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1226615013 is a deficient number, since it is larger than the sum of its proper divisors (691939053).

1226615013 is a wasteful number, since it uses less digits than its factorization.

1226615013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806485 (or 806469 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1226615013 is about 35023.0640150173. The cubic root of 1226615013 is about 1070.4574900458.

The spelling of 1226615013 in words is "one billion, two hundred twenty-six million, six hundred fifteen thousand, thirteen".