113213440 has 64 divisors (see below), whose sum is σ = 272101320. Its totient is φ = 45219840.

The previous prime is 113213431. The next prime is 113213473. The reversal of 113213440 is 44312311.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163495 + ... + 164185.

Almost surely, 2^113213440 is an apocalyptic number.

113213440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136050660).

113213440 is an abundant number, since it is smaller than the sum of its proper divisors (158887880).

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

113213440 is an frugal number, since it uses more digits than its factorization.

113213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 113213440 is about 10640.1804495976. The cubic root of 113213440 is about 483.7630149156.

Adding to 113213440 its reverse (44312311), we get a palindrome (157525751).

The spelling of 113213440 in words is "one hundred thirteen million, two hundred thirteen thousand, four hundred forty".