1165522251 has 8 divisors (see below), whose sum is σ = 1558642384. Its totient is φ = 774708480.

The previous prime is 1165522247. The next prime is 1165522273. The reversal of 1165522251 is 1522255611.

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

It is not a de Polignac number, because 1165522251 - 2² = 1165522247 is a prime.

It is a super-2 number, since 2×1165522251² = 2716884235152214002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165522231) 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, 575410 + ... + 577431.

It is an arithmetic number, because the mean of its divisors is an integer number (194830298).

Almost surely, 2^1165522251 is an apocalyptic number.

1165522251 is a deficient number, since it is larger than the sum of its proper divisors (393120133).

1165522251 is a wasteful number, since it uses less digits than its factorization.

1165522251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153181.

The product of its digits is 6000, while the sum is 30.

The square root of 1165522251 is about 34139.7459129385. The cubic root of 1165522251 is about 1052.3822707652.

Adding to 1165522251 its reverse (1522255611), we get a palindrome (2687777862).

The spelling of 1165522251 in words is "one billion, one hundred sixty-five million, five hundred twenty-two thousand, two hundred fifty-one".