11220525531 has 6 divisors (see below), whose sum is σ = 16207425780. Its totient is φ = 7480350348.

The previous prime is 11220525499. The next prime is 11220525553. The reversal of 11220525531 is 13552502211.

11220525531 is a `hidden beast` number, since 1 + 122 + 0 + 5 + 2 + 5 + 531 = 666.

It is not a de Polignac number, because 11220525531 - 2⁵ = 11220525499 is a prime.

It is a super-2 number, since 2×11220525531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11220525495 and 11220525504.

It is not an unprimeable number, because it can be changed into a prime (11220525571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623362521 + ... + 623362538.

It is an arithmetic number, because the mean of its divisors is an integer number (2701237630).

Almost surely, 2^11220525531 is an apocalyptic number.

11220525531 is a deficient number, since it is larger than the sum of its proper divisors (4986900249).

11220525531 is a wasteful number, since it uses less digits than its factorization.

11220525531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246725065 (or 1246725062 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 11220525531 in words is "eleven billion, two hundred twenty million, five hundred twenty-five thousand, five hundred thirty-one".