1155227257 has 8 divisors (see below), whose sum is σ = 1176151680. Its totient is φ = 1134347760.

The previous prime is 1155227243. The next prime is 1155227261. The reversal of 1155227257 is 7527225511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155227257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155227287) 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, 43003 + ... + 64495.

It is an arithmetic number, because the mean of its divisors is an integer number (147018960).

Almost surely, 2^1155227257 is an apocalyptic number.

It is an amenable number.

1155227257 is a deficient number, since it is larger than the sum of its proper divisors (20924423).

1155227257 is an equidigital number, since it uses as much as digits as its factorization.

1155227257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22463.

The product of its digits is 49000, while the sum is 37.

The square root of 1155227257 is about 33988.6342326372. The cubic root of 1155227257 is about 1049.2745577150.

It can be divided in two parts, 11552 and 27257, that added together give a square (38809 = 197²).

The spelling of 1155227257 in words is "one billion, one hundred fifty-five million, two hundred twenty-seven thousand, two hundred fifty-seven".