16151540 has 24 divisors (see below), whose sum is σ = 34747272. Its totient is φ = 6302720.

The previous prime is 16151491. The next prime is 16151549. The reversal of 16151540 is 4515161.

It can be written as a sum of positive squares in 4 ways, for example, as 438244 + 15713296 = 662^2 + 3964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16151549) 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, 9029 + ... + 10668.

It is an arithmetic number, because the mean of its divisors is an integer number (1447803).

Almost surely, 2^16151540 is an apocalyptic number.

16151540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16151540 is an abundant number, since it is smaller than the sum of its proper divisors (18595732).

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

16151540 is a wasteful number, since it uses less digits than its factorization.

16151540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19747 (or 19745 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 16151540 is about 4018.8978588663. The cubic root of 16151540 is about 252.7772466903. Note that the first 3 decimals are identical.

The spelling of 16151540 in words is "sixteen million, one hundred fifty-one thousand, five hundred forty".