11631573 has 8 divisors (see below), whose sum is σ = 17232000. Its totient is φ = 7754364.

The previous prime is 11631559. The next prime is 11631589. The reversal of 11631573 is 37513611.

It is not a de Polignac number, because 11631573 - 2⁶ = 11631509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 430799 = 11631573 / (1 + 1 + 6 + 3 + 1 + 5 + 7 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11631533) 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, 215373 + ... + 215426.

It is an arithmetic number, because the mean of its divisors is an integer number (2154000).

Almost surely, 2^11631573 is an apocalyptic number.

It is an amenable number.

11631573 is a deficient number, since it is larger than the sum of its proper divisors (5600427).

11631573 is an equidigital number, since it uses as much as digits as its factorization.

11631573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430808 (or 430802 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 11631573 is about 3410.5091995185. The cubic root of 11631573 is about 226.5754320926.

The spelling of 11631573 in words is "eleven million, six hundred thirty-one thousand, five hundred seventy-three".