225401421331 has 4 divisors (see below), whose sum is σ = 235201483152. Its totient is φ = 215601359512.

The previous prime is 225401421263. The next prime is 225401421379. The reversal of 225401421331 is 133124104522.

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

It is a cyclic number.

It is not a de Polignac number, because 225401421331 - 2¹¹ = 225401419283 is a prime.

It is a super-2 number, since 2×225401421331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225401421331.

It is not an unprimeable number, because it can be changed into a prime (225401421731) 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, 4900030876 + ... + 4900030921.

It is an arithmetic number, because the mean of its divisors is an integer number (58800370788).

Almost surely, 2^225401421331 is an apocalyptic number.

225401421331 is a deficient number, since it is larger than the sum of its proper divisors (9800061821).

225401421331 is an equidigital number, since it uses as much as digits as its factorization.

225401421331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9800061820.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 225401421331 its reverse (133124104522), we get a palindrome (358525525853).

The spelling of 225401421331 in words is "two hundred twenty-five billion, four hundred one million, four hundred twenty-one thousand, three hundred thirty-one".