11631567 has 4 divisors (see below), whose sum is σ = 15508760. Its totient is φ = 7754376.

The previous prime is 11631559. The next prime is 11631589. The reversal of 11631567 is 76513611.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11631567 - 2³ = 11631559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11631527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1938592 + ... + 1938597.

It is an arithmetic number, because the mean of its divisors is an integer number (3877190).

Almost surely, 2^11631567 is an apocalyptic number.

11631567 is a deficient number, since it is larger than the sum of its proper divisors (3877193).

11631567 is an equidigital number, since it uses as much as digits as its factorization.

11631567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877192.

The product of its digits is 3780, while the sum is 30.

The square root of 11631567 is about 3410.5083198843. The cubic root of 11631567 is about 226.5753931339.

The spelling of 11631567 in words is "eleven million, six hundred thirty-one thousand, five hundred sixty-seven".