215213453 has 16 divisors (see below), whose sum is σ = 267461376. Its totient is φ = 168618240.

The previous prime is 215213441. The next prime is 215213473. The reversal of 215213453 is 354312512.

It is a happy number.

It is not a de Polignac number, because 215213453 - 2⁶ = 215213389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215213473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2108 + ... + 20853.

It is an arithmetic number, because the mean of its divisors is an integer number (16716336).

Almost surely, 2^215213453 is an apocalyptic number.

It is an amenable number.

215213453 is a deficient number, since it is larger than the sum of its proper divisors (52247923).

215213453 is a wasteful number, since it uses less digits than its factorization.

215213453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23084.

The product of its digits is 3600, while the sum is 26.

The square root of 215213453 is about 14670.1551798200. The cubic root of 215213453 is about 599.2708299514.

Adding to 215213453 its reverse (354312512), we get a palindrome (569525965).

The spelling of 215213453 in words is "two hundred fifteen million, two hundred thirteen thousand, four hundred fifty-three".