1131723215 has 8 divisors (see below), whose sum is σ = 1552077600. Its totient is φ = 776038752.

The previous prime is 1131723193. The next prime is 1131723217. The reversal of 1131723215 is 5123271311.

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 1131723215 - 2¹⁰ = 1131722191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131723217) 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, 16167440 + ... + 16167509.

It is an arithmetic number, because the mean of its divisors is an integer number (194009700).

Almost surely, 2^1131723215 is an apocalyptic number.

1131723215 is a deficient number, since it is larger than the sum of its proper divisors (420354385).

1131723215 is an equidigital number, since it uses as much as digits as its factorization.

1131723215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32334961.

The product of its digits is 1260, while the sum is 26.

The square root of 1131723215 is about 33641.0941409461. The cubic root of 1131723215 is about 1042.1096276998.

Adding to 1131723215 its reverse (5123271311), we get a palindrome (6254994526).

The spelling of 1131723215 in words is "one billion, one hundred thirty-one million, seven hundred twenty-three thousand, two hundred fifteen".