1226513151 has 16 divisors (see below), whose sum is σ = 1817606400. Its totient is φ = 817428024.

The previous prime is 1226513131. The next prime is 1226513159. The reversal of 1226513151 is 1513156221.

1226513151 is a `hidden beast` number, since 1 + 2 + 2 + 651 + 3 + 1 + 5 + 1 = 666.

It is not a de Polignac number, because 1226513151 - 2¹⁰ = 1226512127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226513159) 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, 145120 + ... + 153338.

It is an arithmetic number, because the mean of its divisors is an integer number (113600400).

Almost surely, 2^1226513151 is an apocalyptic number.

1226513151 is a deficient number, since it is larger than the sum of its proper divisors (591093249).

1226513151 is an equidigital number, since it uses as much as digits as its factorization.

1226513151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13755 (or 13749 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1226513151 is about 35021.6097716824. The cubic root of 1226513151 is about 1070.4278578308.

Adding to 1226513151 its reverse (1513156221), we get a palindrome (2739669372).

The spelling of 1226513151 in words is "one billion, two hundred twenty-six million, five hundred thirteen thousand, one hundred fifty-one".