4221507425 has 12 divisors (see below), whose sum is σ = 5236351980. Its totient is φ = 3376120320.

The previous prime is 4221507401. The next prime is 4221507461. The reversal of 4221507425 is 5247051224.

It can be written as a sum of positive squares in 6 ways, for example, as 28815424 + 4192692001 = 5368^2 + 64751^2 .

It is not a de Polignac number, because 4221507425 - 2²⁰ = 4220458849 is a prime.

It is a super-2 number, since 2×4221507425² = 35642249878660261250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4221507391 and 4221507400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57341 + ... + 108309.

It is an arithmetic number, because the mean of its divisors is an integer number (436362665).

Almost surely, 2^4221507425 is an apocalyptic number.

It is an amenable number.

4221507425 is a deficient number, since it is larger than the sum of its proper divisors (1014844555).

4221507425 is a wasteful number, since it uses less digits than its factorization.

4221507425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54292 (or 54287 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 4221507425 is about 64973.1284840125. The cubic root of 4221507425 is about 1616.1779818642.

Adding to 4221507425 its reverse (5247051224), we get a palindrome (9468558649).

The spelling of 4221507425 in words is "four billion, two hundred twenty-one million, five hundred seven thousand, four hundred twenty-five".