213451423523 has 8 divisors (see below), whose sum is σ = 229906832400. Its totient is φ = 197001167328.

The previous prime is 213451423501. The next prime is 213451423543. The reversal of 213451423523 is 325324154312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213451423523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213451423543) 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, 1201913 + ... + 1368026.

It is an arithmetic number, because the mean of its divisors is an integer number (28738354050).

Almost surely, 2^213451423523 is an apocalyptic number.

213451423523 is a deficient number, since it is larger than the sum of its proper divisors (16455408877).

213451423523 is a wasteful number, since it uses less digits than its factorization.

213451423523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576341.

The product of its digits is 86400, while the sum is 35.

Adding to 213451423523 its reverse (325324154312), we get a palindrome (538775577835).

The spelling of 213451423523 in words is "two hundred thirteen billion, four hundred fifty-one million, four hundred twenty-three thousand, five hundred twenty-three".