625215983 has 4 divisors (see below), whose sum is σ = 714532560. Its totient is φ = 535899408.

The previous prime is 625215917. The next prime is 625216057. The reversal of 625215983 is 389512526.

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 625215983 - 2¹⁶ = 625150447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 625215983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625212983) 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, 44658278 + ... + 44658291.

It is an arithmetic number, because the mean of its divisors is an integer number (178633140).

Almost surely, 2^625215983 is an apocalyptic number.

625215983 is a deficient number, since it is larger than the sum of its proper divisors (89316577).

625215983 is an equidigital number, since it uses as much as digits as its factorization.

625215983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89316576.

The product of its digits is 129600, while the sum is 41.

The square root of 625215983 is about 25004.3192868752. The cubic root of 625215983 is about 855.0864488584.

The spelling of 625215983 in words is "six hundred twenty-five million, two hundred fifteen thousand, nine hundred eighty-three".