1226500155 has 24 divisors (see below), whose sum is σ = 2145446160. Its totient is φ = 648129600.

The previous prime is 1226500153. The next prime is 1226500169. The reversal of 1226500155 is 5510056221.

1226500155 is a `hidden beast` number, since 1 + 2 + 2 + 6 + 500 + 155 = 666.

It is not a de Polignac number, because 1226500155 - 2¹ = 1226500153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1226500153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120121 + ... + 129930.

It is an arithmetic number, because the mean of its divisors is an integer number (89393590).

Almost surely, 2^1226500155 is an apocalyptic number.

1226500155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1226500155 is a deficient number, since it is larger than the sum of its proper divisors (918946005).

1226500155 is a wasteful number, since it uses less digits than its factorization.

1226500155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250171 (or 250168 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1226500155 is about 35021.4242286061. The cubic root of 1226500155 is about 1070.4240771051.

Adding to 1226500155 its reverse (5510056221), we get a palindrome (6736556376).

The spelling of 1226500155 in words is "one billion, two hundred twenty-six million, five hundred thousand, one hundred fifty-five".