225139547491 has 8 divisors (see below), whose sum is σ = 225708653520. Its totient is φ = 224570593632.

The previous prime is 225139547467. The next prime is 225139547497. The reversal of 225139547491 is 194745931522.

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 225139547491 - 2⁷ = 225139547363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225139547497) 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, 3290061 + ... + 3357793.

It is an arithmetic number, because the mean of its divisors is an integer number (28213581690).

Almost surely, 2^225139547491 is an apocalyptic number.

225139547491 is a deficient number, since it is larger than the sum of its proper divisors (569106029).

225139547491 is an equidigital number, since it uses as much as digits as its factorization.

225139547491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76085.

The product of its digits is 2721600, while the sum is 52.

The spelling of 225139547491 in words is "two hundred twenty-five billion, one hundred thirty-nine million, five hundred forty-seven thousand, four hundred ninety-one".