213506736164731 has 8 divisors (see below), whose sum is σ = 225598472478720. Its totient is φ = 201500453818152.

The previous prime is 213506736164587. The next prime is 213506736164797. The reversal of 213506736164731 is 137461637605312.

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 213506736164731 - 2²¹ = 213506734067579 is a prime.

It is a super-2 number, since 2×213506736164731² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213506736165731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21363486715 + ... + 21363496708.

It is an arithmetic number, because the mean of its divisors is an integer number (28199809059840).

Almost surely, 2^{213506736164731} is an apocalyptic number.

213506736164731 is a deficient number, since it is larger than the sum of its proper divisors (12091736313989).

213506736164731 is a wasteful number, since it uses less digits than its factorization.

213506736164731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42726983705.

The product of its (nonzero) digits is 11430720, while the sum is 55.

The spelling of 213506736164731 in words is "two hundred thirteen trillion, five hundred six billion, seven hundred thirty-six million, one hundred sixty-four thousand, seven hundred thirty-one".