215033868481 has 4 divisors (see below), whose sum is σ = 216353094832. Its totient is φ = 213714642132.

The previous prime is 215033868473. The next prime is 215033868521. The reversal of 215033868481 is 184868330512.

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 215033868481 - 2³ = 215033868473 is a prime.

It is a super-2 number, since 2×215033868481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215033865481) 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, 659612931 + ... + 659613256.

It is an arithmetic number, because the mean of its divisors is an integer number (54088273708).

Almost surely, 2^215033868481 is an apocalyptic number.

It is an amenable number.

215033868481 is a deficient number, since it is larger than the sum of its proper divisors (1319226351).

215033868481 is a wasteful number, since it uses less digits than its factorization.

215033868481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319226350.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 215033868481 in words is "two hundred fifteen billion, thirty-three million, eight hundred sixty-eight thousand, four hundred eighty-one".