2625506221 has 4 divisors (see below), whose sum is σ = 2827468252. Its totient is φ = 2423544192.

The previous prime is 2625506201. The next prime is 2625506237. The reversal of 2625506221 is 1226055262.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1663824100 + 961682121 = 40790^2 + 31011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2625506221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2625506201) 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, 100980996 + ... + 100981021.

It is an arithmetic number, because the mean of its divisors is an integer number (706867063).

Almost surely, 2^2625506221 is an apocalyptic number.

It is an amenable number.

2625506221 is a deficient number, since it is larger than the sum of its proper divisors (201962031).

2625506221 is a wasteful number, since it uses less digits than its factorization.

2625506221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201962030.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2625506221 is about 51239.6938027541. The cubic root of 2625506221 is about 1379.5507571167.

The spelling of 2625506221 in words is "two billion, six hundred twenty-five million, five hundred six thousand, two hundred twenty-one".