1427165217 has 16 divisors (see below), whose sum is σ = 2121962880. Its totient is φ = 948003696.

The previous prime is 1427165213. The next prime is 1427165237. The reversal of 1427165217 is 7125617241.

1427165217 is a `hidden beast` number, since 1 + 427 + 16 + 5 + 217 = 666.

It is not a de Polignac number, because 1427165217 - 2² = 1427165213 is a prime.

It is a super-2 number, since 2×1427165217² = 4073601113229314178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1427165213) 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, 87933 + ... + 102890.

It is an arithmetic number, because the mean of its divisors is an integer number (132622680).

Almost surely, 2^1427165217 is an apocalyptic number.

It is an amenable number.

1427165217 is a deficient number, since it is larger than the sum of its proper divisors (694797663).

1427165217 is a wasteful number, since it uses less digits than its factorization.

1427165217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191109 (or 191103 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 1427165217 is about 37777.8402903078. The cubic root of 1427165217 is about 1125.8782191382.

The spelling of 1427165217 in words is "one billion, four hundred twenty-seven million, one hundred sixty-five thousand, two hundred seventeen".