616521083 has 4 divisors (see below), whose sum is σ = 626628048. Its totient is φ = 606414120.

The previous prime is 616521079. The next prime is 616521089. The reversal of 616521083 is 380125616.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 616521083 - 2² = 616521079 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616521089) 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, 5053391 + ... + 5053512.

It is an arithmetic number, because the mean of its divisors is an integer number (156657012).

Almost surely, 2^616521083 is an apocalyptic number.

616521083 is a deficient number, since it is larger than the sum of its proper divisors (10106965).

616521083 is a wasteful number, since it uses less digits than its factorization.

616521083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106964.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 616521083 is about 24829.8425891104. The cubic root of 616521083 is about 851.1040246987.

Adding to 616521083 its reverse (380125616), we get a palindrome (996646699).

The spelling of 616521083 in words is "six hundred sixteen million, five hundred twenty-one thousand, eighty-three".