215147764231 has 8 divisors (see below), whose sum is σ = 218395040864. Its totient is φ = 211908597120.

The previous prime is 215147764213. The next prime is 215147764253. The reversal of 215147764231 is 132467741512.

215147764231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215147764231 - 2¹³ = 215147756039 is a prime.

It is a super-2 number, since 2×215147764231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215147762231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1973910 + ... + 2080051.

It is an arithmetic number, because the mean of its divisors is an integer number (27299380108).

Almost surely, 2^215147764231 is an apocalyptic number.

215147764231 is a deficient number, since it is larger than the sum of its proper divisors (3247276633).

215147764231 is an equidigital number, since it uses as much as digits as its factorization.

215147764231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054761.

The product of its digits is 282240, while the sum is 43.

The spelling of 215147764231 in words is "two hundred fifteen billion, one hundred forty-seven million, seven hundred sixty-four thousand, two hundred thirty-one".