11013531531 has 32 divisors (see below), whose sum is σ = 15471820800. Its totient is φ = 6955284864.

The previous prime is 11013531527. The next prime is 11013531539. The reversal of 11013531531 is 13513531011.

It is a happy number.

It is not a de Polignac number, because 11013531531 - 2² = 11013531527 is a prime.

It is a super-2 number, since 2×11013531531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11013531539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3936225 + ... + 3939021.

It is an arithmetic number, because the mean of its divisors is an integer number (483494400).

Almost surely, 2^11013531531 is an apocalyptic number.

11013531531 is a deficient number, since it is larger than the sum of its proper divisors (4458289269).

11013531531 is a wasteful number, since it uses less digits than its factorization.

11013531531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355.

The product of its (nonzero) digits is 675, while the sum is 24.

The spelling of 11013531531 in words is "eleven billion, thirteen million, five hundred thirty-one thousand, five hundred thirty-one".