11351231406 has 32 divisors (see below), whose sum is σ = 25906718880. Its totient is φ = 3681479808.

The previous prime is 11351231393. The next prime is 11351231407. The reversal of 11351231406 is 60413215311.

It is a happy number.

11351231406 is a `hidden beast` number, since 1 + 1 + 3 + 512 + 3 + 140 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 11351231406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11351231407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2838651 + ... + 2842646.

It is an arithmetic number, because the mean of its divisors is an integer number (809584965).

Almost surely, 2^11351231406 is an apocalyptic number.

11351231406 is an abundant number, since it is smaller than the sum of its proper divisors (14555487474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11351231406 is a wasteful number, since it uses less digits than its factorization.

11351231406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681345 (or 5681339 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 11351231406 its reverse (60413215311), we get a palindrome (71764446717).

The spelling of 11351231406 in words is "eleven billion, three hundred fifty-one million, two hundred thirty-one thousand, four hundred six".