16145623 has 4 divisors (see below), whose sum is σ = 17387608. Its totient is φ = 14903640.

The previous prime is 16145617. The next prime is 16145627. The reversal of 16145623 is 32654161.

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 16145623 - 2¹³ = 16137431 is a prime.

It is a super-2 number, since 2×16145623² = 521362284116258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16145591 and 16145600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16145627) 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, 620973 + ... + 620998.

It is an arithmetic number, because the mean of its divisors is an integer number (4346902).

Almost surely, 2^16145623 is an apocalyptic number.

16145623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16145623 is a deficient number, since it is larger than the sum of its proper divisors (1241985).

16145623 is a wasteful number, since it uses less digits than its factorization.

16145623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241984.

The product of its digits is 4320, while the sum is 28.

The square root of 16145623 is about 4018.1616443344. The cubic root of 16145623 is about 252.7463752141.

Adding to 16145623 its reverse (32654161), we get a palindrome (48799784).

The spelling of 16145623 in words is "sixteen million, one hundred forty-five thousand, six hundred twenty-three".