213523035223256 has 32 divisors (see below), whose sum is σ = 441075936865680. Its totient is φ = 96094975344000.

The previous prime is 213523035223249. The next prime is 213523035223259. The reversal of 213523035223256 is 652322530325312.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213523035223259) 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, 12011863031 + ... + 12011880806.

Almost surely, 2^{213523035223256} is an apocalyptic number.

It is an amenable number.

213523035223256 is an abundant number, since it is smaller than the sum of its proper divisors (227552901642424).

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

213523035223256 is a wasteful number, since it uses less digits than its factorization.

213523035223256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24023743955 (or 24023743951 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 44.

Adding to 213523035223256 its reverse (652322530325312), we get a palindrome (865845565548568).

The spelling of 213523035223256 in words is "two hundred thirteen trillion, five hundred twenty-three billion, thirty-five million, two hundred twenty-three thousand, two hundred fifty-six".