2153216540 has 12 divisors (see below), whose sum is σ = 4521754776. Its totient is φ = 861286608.

The previous prime is 2153216521. The next prime is 2153216543. The reversal of 2153216540 is 456123512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153216543) 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, 53830394 + ... + 53830433.

It is an arithmetic number, because the mean of its divisors is an integer number (376812898).

Almost surely, 2^2153216540 is an apocalyptic number.

2153216540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2153216540 is an abundant number, since it is smaller than the sum of its proper divisors (2368538236).

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

2153216540 is a wasteful number, since it uses less digits than its factorization.

2153216540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107660836 (or 107660834 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2153216540 is about 46402.7643573096. The cubic root of 2153216540 is about 1291.3061985364.

The spelling of 2153216540 in words is "two billion, one hundred fifty-three million, two hundred sixteen thousand, five hundred forty".