113213545 has 4 divisors (see below), whose sum is σ = 135856260. Its totient is φ = 90570832.

The previous prime is 113213497. The next prime is 113213549. The reversal of 113213545 is 545312311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545312311 = 541 ⋅1007971.

It can be written as a sum of positive squares in 2 ways, for example, as 33593616 + 79619929 = 5796^2 + 8923^2 .

It is a cyclic number.

It is not a de Polignac number, because 113213545 - 2¹⁹ = 112689257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113213549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11321350 + ... + 11321359.

It is an arithmetic number, because the mean of its divisors is an integer number (33964065).

Almost surely, 2^113213545 is an apocalyptic number.

It is an amenable number.

113213545 is a deficient number, since it is larger than the sum of its proper divisors (22642715).

113213545 is an equidigital number, since it uses as much as digits as its factorization.

113213545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22642714.

The product of its digits is 1800, while the sum is 25.

The square root of 113213545 is about 10640.1853837233. The cubic root of 113213545 is about 483.7631644711.

Adding to 113213545 its reverse (545312311), we get a palindrome (658525856).

The spelling of 113213545 in words is "one hundred thirteen million, two hundred thirteen thousand, five hundred forty-five".