16997523431 has 8 divisors (see below), whose sum is σ = 19427155104. Its totient is φ = 14568245280.

The previous prime is 16997523427. The next prime is 16997523461. The reversal of 16997523431 is 13432579961.

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

It is a cyclic number.

It is not a de Polignac number, because 16997523431 - 2² = 16997523427 is a prime.

It is a super-2 number, since 2×16997523431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16997523431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16997523421) 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, 24221 + ... + 185961.

It is an arithmetic number, because the mean of its divisors is an integer number (2428394388).

Almost surely, 2^16997523431 is an apocalyptic number.

16997523431 is a deficient number, since it is larger than the sum of its proper divisors (2429631673).

16997523431 is a wasteful number, since it uses less digits than its factorization.

16997523431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176761.

The product of its digits is 1224720, while the sum is 50.

The spelling of 16997523431 in words is "sixteen billion, nine hundred ninety-seven million, five hundred twenty-three thousand, four hundred thirty-one".