16201540 has 24 divisors (see below), whose sum is σ = 34816320. Its totient is φ = 6329568.

The previous prime is 16201531. The next prime is 16201541. The reversal of 16201540 is 4510261.

It is not an unprimeable number, because it can be changed into a prime (16201541) 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, 8560 + ... + 10279.

It is an arithmetic number, because the mean of its divisors is an integer number (1450680).

Almost surely, 2^16201540 is an apocalyptic number.

16201540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16201540 is an abundant number, since it is smaller than the sum of its proper divisors (18614780).

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

16201540 is a wasteful number, since it uses less digits than its factorization.

16201540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18891 (or 18889 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 16201540 is about 4025.1136629914. The cubic root of 16201540 is about 253.0378171532.

It can be divided in two parts, 1620 and 1540, that added together give a triangular number (3160 = T₇₉).

The spelling of 16201540 in words is "sixteen million, two hundred one thousand, five hundred forty".