13521042623 has 4 divisors (see below), whose sum is σ = 14750228328. Its totient is φ = 12291856920.

The previous prime is 13521042617. The next prime is 13521042641. The reversal of 13521042623 is 32624012531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13521042623 - 2¹² = 13521038527 is a prime.

It is a super-2 number, since 2×13521042623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521042323) 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, 614592836 + ... + 614592857.

It is an arithmetic number, because the mean of its divisors is an integer number (3687557082).

Almost surely, 2^13521042623 is an apocalyptic number.

13521042623 is a deficient number, since it is larger than the sum of its proper divisors (1229185705).

13521042623 is a wasteful number, since it uses less digits than its factorization.

13521042623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229185704.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 13521042623 in words is "thirteen billion, five hundred twenty-one million, forty-two thousand, six hundred twenty-three".