215353431013 has 4 divisors (see below), whose sum is σ = 246118206880. Its totient is φ = 184588655148.

The previous prime is 215353430983. The next prime is 215353431017. The reversal of 215353431013 is 310134353512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215353431013 - 2²¹ = 215351333861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215353431017) 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, 15382387923 + ... + 15382387936.

It is an arithmetic number, because the mean of its divisors is an integer number (61529551720).

Almost surely, 2^215353431013 is an apocalyptic number.

It is an amenable number.

215353431013 is a deficient number, since it is larger than the sum of its proper divisors (30764775867).

215353431013 is an equidigital number, since it uses as much as digits as its factorization.

215353431013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30764775866.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 215353431013 its reverse (310134353512), we get a palindrome (525487784525).

The spelling of 215353431013 in words is "two hundred fifteen billion, three hundred fifty-three million, four hundred thirty-one thousand, thirteen".