215413423 has 4 divisors (see below), whose sum is σ = 224779248. Its totient is φ = 206047600.

The previous prime is 215413417. The next prime is 215413447. The reversal of 215413423 is 324314512.

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

It is a cyclic number.

It is not a de Polignac number, because 215413423 - 2²⁵ = 181858991 is a prime.

It is a super-4 number, since 4×215413423⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215413403) 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, 4682878 + ... + 4682923.

It is an arithmetic number, because the mean of its divisors is an integer number (56194812).

Almost surely, 2^215413423 is an apocalyptic number.

215413423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

215413423 is a deficient number, since it is larger than the sum of its proper divisors (9365825).

215413423 is an equidigital number, since it uses as much as digits as its factorization.

215413423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9365824.

The product of its digits is 2880, while the sum is 25.

The square root of 215413423 is about 14676.9691353494. The cubic root of 215413423 is about 599.4563807604.

Adding to 215413423 its reverse (324314512), we get a palindrome (539727935).

It can be divided in two parts, 21541 and 3423, that added together give a square (24964 = 158²).

The spelling of 215413423 in words is "two hundred fifteen million, four hundred thirteen thousand, four hundred twenty-three".