10991253 has 48 divisors (see below), whose sum is σ = 19207680. Its totient is φ = 5458752.

The previous prime is 10991249. The next prime is 10991269. The reversal of 10991253 is 35219901.

It is not a de Polignac number, because 10991253 - 2² = 10991249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10991253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67350 + ... + 67512.

It is an arithmetic number, because the mean of its divisors is an integer number (400160).

Almost surely, 2^10991253 is an apocalyptic number.

10991253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

10991253 is a deficient number, since it is larger than the sum of its proper divisors (8216427).

10991253 is a wasteful number, since it uses less digits than its factorization.

10991253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 10991253 is about 3315.3058682420. The cubic root of 10991253 is about 222.3390444739.

The spelling of 10991253 in words is "ten million, nine hundred ninety-one thousand, two hundred fifty-three".