225691297140 has 24 divisors (see below), whose sum is σ = 631935632160. Its totient is φ = 60184345888.

The previous prime is 225691297123. The next prime is 225691297151. The reversal of 225691297140 is 41792196522.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 225691297140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1880760750 + ... + 1880760869.

It is an arithmetic number, because the mean of its divisors is an integer number (26330651340).

Almost surely, 2^225691297140 is an apocalyptic number.

225691297140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225691297140 is an abundant number, since it is smaller than the sum of its proper divisors (406244335020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225691297140 is a wasteful number, since it uses less digits than its factorization.

225691297140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761521631 (or 3761521629 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 225691297140 in words is "two hundred twenty-five billion, six hundred ninety-one million, two hundred ninety-seven thousand, one hundred forty".