1227656513 has 8 divisors (see below), whose sum is σ = 1341803520. Its totient is φ = 1118168640.

The previous prime is 1227656509. The next prime is 1227656539. The reversal of 1227656513 is 3156567221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1227656513 - 2² = 1227656509 is a prime.

It is a super-2 number, since 2×1227656513² = 3014281027822638338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1227656593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1164233 + ... + 1165286.

It is an arithmetic number, because the mean of its divisors is an integer number (167725440).

Almost surely, 2^1227656513 is an apocalyptic number.

It is an amenable number.

1227656513 is a deficient number, since it is larger than the sum of its proper divisors (114147007).

1227656513 is a wasteful number, since it uses less digits than its factorization.

1227656513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329567.

The product of its digits is 75600, while the sum is 38.

The square root of 1227656513 is about 35037.9296334701. The cubic root of 1227656513 is about 1070.7603740178.

The spelling of 1227656513 in words is "one billion, two hundred twenty-seven million, six hundred fifty-six thousand, five hundred thirteen".