215402425213 has 4 divisors (see below), whose sum is σ = 215441151328. Its totient is φ = 215363699100.

The previous prime is 215402425211. The next prime is 215402425229. The reversal of 215402425213 is 312524204512.

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 215402425213 - 2¹ = 215402425211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215402425211) 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, 19354713 + ... + 19365838.

It is an arithmetic number, because the mean of its divisors is an integer number (53860287832).

Almost surely, 2^215402425213 is an apocalyptic number.

It is an amenable number.

215402425213 is a deficient number, since it is larger than the sum of its proper divisors (38726115).

215402425213 is an equidigital number, since it uses as much as digits as its factorization.

215402425213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38726114.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 215402425213 its reverse (312524204512), we get a palindrome (527926629725).

The spelling of 215402425213 in words is "two hundred fifteen billion, four hundred two million, four hundred twenty-five thousand, two hundred thirteen".