10002555421 has 8 divisors (see below), whose sum is σ = 10644705720. Its totient is φ = 9366379008.

The previous prime is 10002555413. The next prime is 10002555427. The reversal of 10002555421 is 12455520001.

It can be written as a sum of positive squares in 4 ways, for example, as 3895132921 + 6107422500 = 62411^2 + 78150^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 10002555421 - 2³ = 10002555413 is a prime.

It is a super-2 number, since 2×10002555421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002555427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490016 + ... + 1496713.

It is an arithmetic number, because the mean of its divisors is an integer number (1330588215).

Almost surely, 2^10002555421 is an apocalyptic number.

It is an amenable number.

10002555421 is a deficient number, since it is larger than the sum of its proper divisors (642150299).

10002555421 is a wasteful number, since it uses less digits than its factorization.

10002555421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986943.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 10002555421 in words is "ten billion, two million, five hundred fifty-five thousand, four hundred twenty-one".