105213403 has 4 divisors (see below), whose sum is σ = 105859048. Its totient is φ = 104567760.

The previous prime is 105213377. The next prime is 105213419. The reversal of 105213403 is 304312501.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 105213403 - 2¹³ = 105205211 is a prime.

It is a super-2 number, since 2×105213403² = 22139720341680818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105213443) 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, 322578 + ... + 322903.

It is an arithmetic number, because the mean of its divisors is an integer number (26464762).

Almost surely, 2^105213403 is an apocalyptic number.

105213403 is a deficient number, since it is larger than the sum of its proper divisors (645645).

105213403 is an equidigital number, since it uses as much as digits as its factorization.

105213403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645644.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 105213403 is about 10257.3584806226. The cubic root of 105213403 is about 472.0887912892.

Adding to 105213403 its reverse (304312501), we get a palindrome (409525904).

It can be divided in two parts, 10521 and 3403, that added together give a square (13924 = 118²).

The spelling of 105213403 in words is "one hundred five million, two hundred thirteen thousand, four hundred three".