2506221402 has 8 divisors (see below), whose sum is σ = 5012442816. Its totient is φ = 835407132.

The previous prime is 2506221401. The next prime is 2506221407. The reversal of 2506221402 is 2041226052.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2506221402 is an admirable number.

It is a super-2 number, since 2×2506221402² = 12562291431685691208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2506221401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208851778 + ... + 208851789.

It is an arithmetic number, because the mean of its divisors is an integer number (626555352).

Almost surely, 2^2506221402 is an apocalyptic number.

2506221402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2506221402 is a wasteful number, since it uses less digits than its factorization.

2506221402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417703572.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2506221402 is about 50062.1753622433. The cubic root of 2506221402 is about 1358.3337078984. Note that the first 3 decimals are identical.

Adding to 2506221402 its reverse (2041226052), we get a palindrome (4547447454).

It can be divided in two parts, 25062 and 21402, that added together give a palindrome (46464).

The spelling of 2506221402 in words is "two billion, five hundred six million, two hundred twenty-one thousand, four hundred two".