212534565531 has 8 divisors (see below), whose sum is σ = 290291114064. Its totient is φ = 138233863680.

The previous prime is 212534565521. The next prime is 212534565541. The reversal of 212534565531 is 135565435212.

It is an interprime number because it is at equal distance from previous prime (212534565521) and next prime (212534565541).

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

It is not a de Polignac number, because 212534565531 - 2¹⁷ = 212534434459 is a prime.

It is a super-2 number, since 2×212534565531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212534565521) 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, 863961526 + ... + 863961771.

It is an arithmetic number, because the mean of its divisors is an integer number (36286389258).

Almost surely, 2^212534565531 is an apocalyptic number.

212534565531 is a deficient number, since it is larger than the sum of its proper divisors (77756548533).

212534565531 is a wasteful number, since it uses less digits than its factorization.

212534565531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727923341.

The product of its digits is 540000, while the sum is 42.

The spelling of 212534565531 in words is "two hundred twelve billion, five hundred thirty-four million, five hundred sixty-five thousand, five hundred thirty-one".