213400673532 has 72 divisors (see below), whose sum is σ = 571276205136. Its totient is φ = 66935683584.

The previous prime is 213400673531. The next prime is 213400673533. The reversal of 213400673532 is 235376004312.

213400673532 is a `hidden beast` number, since 2 + 13 + 40 + 0 + 6 + 73 + 532 = 666.

It is an interprime number because it is at equal distance from previous prime (213400673531) and next prime (213400673533).

It is a super-2 number, since 2×213400673532² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213400673531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3239758 + ... + 3304970.

It is an arithmetic number, because the mean of its divisors is an integer number (7934391738).

Almost surely, 2^213400673532 is an apocalyptic number.

It is an amenable number.

213400673532 is an abundant number, since it is smaller than the sum of its proper divisors (357875531604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213400673532 is a wasteful number, since it uses less digits than its factorization.

213400673532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70587 (or 70582 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

Adding to 213400673532 its reverse (235376004312), we get a palindrome (448776677844).

The spelling of 213400673532 in words is "two hundred thirteen billion, four hundred million, six hundred seventy-three thousand, five hundred thirty-two".