11197531 has 4 divisors (see below), whose sum is σ = 11254000. Its totient is φ = 11141064.

The previous prime is 11197523. The next prime is 11197547. The reversal of 11197531 is 13579111.

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

It is a cyclic number.

It is not a de Polignac number, because 11197531 - 2³ = 11197523 is a prime.

It is a super-2 number, since 2×11197531² = 250769400991922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11197531.

It is not an unprimeable number, because it can be changed into a prime (11197561) 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, 27936 + ... + 28333.

It is an arithmetic number, because the mean of its divisors is an integer number (2813500).

Almost surely, 2^11197531 is an apocalyptic number.

11197531 is a deficient number, since it is larger than the sum of its proper divisors (56469).

11197531 is an equidigital number, since it uses as much as digits as its factorization.

11197531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56468.

The product of its digits is 945, while the sum is 28.

The square root of 11197531 is about 3346.2712083751. The cubic root of 11197531 is about 223.7213464759.

The spelling of 11197531 in words is "eleven million, one hundred ninety-seven thousand, five hundred thirty-one".