213256542165029 has 4 divisors (see below), whose sum is σ = 232643500543680. Its totient is φ = 193869583786380.

The previous prime is 213256542165001. The next prime is 213256542165047. The reversal of 213256542165029 is 920561245652312.

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 213256542165029 - 2¹⁶ = 213256542099493 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 (213256542165059) 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, 9693479189309 + ... + 9693479189330.

It is an arithmetic number, because the mean of its divisors is an integer number (58160875135920).

Almost surely, 2^{213256542165029} is an apocalyptic number.

It is an amenable number.

213256542165029 is a deficient number, since it is larger than the sum of its proper divisors (19386958378651).

213256542165029 is a wasteful number, since it uses less digits than its factorization.

213256542165029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19386958378650.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 213256542165029 in words is "two hundred thirteen trillion, two hundred fifty-six billion, five hundred forty-two million, one hundred sixty-five thousand, twenty-nine".