215454413 has 6 divisors (see below), whose sum is σ = 228874026. Its totient is φ = 202780352.

The previous prime is 215454403. The next prime is 215454419. The reversal of 215454413 is 314454512.

It can be written as a sum of positive squares in 3 ways, for example, as 134490409 + 80964004 = 11597^2 + 8998^2 .

It is not a de Polignac number, because 215454413 - 2¹⁰ = 215453389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215454419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 372470 + ... + 373047.

It is an arithmetic number, because the mean of its divisors is an integer number (38145671).

Almost surely, 2^215454413 is an apocalyptic number.

It is an amenable number.

215454413 is a deficient number, since it is larger than the sum of its proper divisors (13419613).

215454413 is an equidigital number, since it uses as much as digits as its factorization.

215454413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745551 (or 745534 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 215454413 is about 14678.3654743980. The cubic root of 215454413 is about 599.4944009208.

Subtracting 215454413 from its reverse (314454512), we obtain a palindrome (99000099).

The spelling of 215454413 in words is "two hundred fifteen million, four hundred fifty-four thousand, four hundred thirteen".