16145520 has 40 divisors (see below), whose sum is σ = 50051856. Its totient is φ = 4305408.

The previous prime is 16145477. The next prime is 16145531. The reversal of 16145520 is 2554161.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33397 + ... + 33876.

Almost surely, 2^16145520 is an apocalyptic number.

16145520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16145520 is an abundant number, since it is smaller than the sum of its proper divisors (33906336).

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

16145520 is a wasteful number, since it uses less digits than its factorization.

16145520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67289 (or 67283 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 16145520 is about 4018.1488275075. The cubic root of 16145520 is about 252.7458377530.

Adding to 16145520 its reverse (2554161), we get a palindrome (18699681).

The spelling of 16145520 in words is "sixteen million, one hundred forty-five thousand, five hundred twenty".