2145216536 has 64 divisors (see below), whose sum is σ = 4433486400. Its totient is φ = 968568832.

The previous prime is 2145216517. The next prime is 2145216547. The reversal of 2145216536 is 6356125412.

It is a junction number, because it is equal to n+sod(n) for n = 2145216496 and 2145216505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657020 + ... + 660276.

It is an arithmetic number, because the mean of its divisors is an integer number (69273225).

Almost surely, 2^2145216536 is an apocalyptic number.

It is an amenable number.

2145216536 is an abundant number, since it is smaller than the sum of its proper divisors (2288269864).

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

2145216536 is a wasteful number, since it uses less digits than its factorization.

2145216536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 3472 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 2145216536 is about 46316.4823362051. The cubic root of 2145216536 is about 1289.7049855189.

The spelling of 2145216536 in words is "two billion, one hundred forty-five million, two hundred sixteen thousand, five hundred thirty-six".