625348821 has 4 divisors (see below), whose sum is σ = 833798432. Its totient is φ = 416899212.

The previous prime is 625348793. The next prime is 625348831. The reversal of 625348821 is 128843526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 625348821 - 2¹¹ = 625346773 is a prime.

It is a super-2 number, since 2×625348821² = 782122295852180082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625348821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625348831) 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, 104224801 + ... + 104224806.

It is an arithmetic number, because the mean of its divisors is an integer number (208449608).

Almost surely, 2^625348821 is an apocalyptic number.

It is an amenable number.

625348821 is a deficient number, since it is larger than the sum of its proper divisors (208449611).

625348821 is a wasteful number, since it uses less digits than its factorization.

625348821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208449610.

The product of its digits is 92160, while the sum is 39.

The square root of 625348821 is about 25006.9754468628. The cubic root of 625348821 is about 855.1470038949.

The spelling of 625348821 in words is "six hundred twenty-five million, three hundred forty-eight thousand, eight hundred twenty-one".