225640367421 has 16 divisors (see below), whose sum is σ = 343886694528. Its totient is φ = 128917195200.

The previous prime is 225640367417. The next prime is 225640367423. The reversal of 225640367421 is 124763046522.

225640367421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225640367421 - 2² = 225640367417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225640367423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701850 + ... + 971531.

It is an arithmetic number, because the mean of its divisors is an integer number (21492918408).

Almost surely, 2^225640367421 is an apocalyptic number.

225640367421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

225640367421 is a deficient number, since it is larger than the sum of its proper divisors (118246327107).

225640367421 is a wasteful number, since it uses less digits than its factorization.

225640367421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679812.

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 225640367421 in words is "two hundred twenty-five billion, six hundred forty million, three hundred sixty-seven thousand, four hundred twenty-one".