225723747420 has 72 divisors (see below), whose sum is σ = 684788504400. Its totient is φ = 60184811520.

The previous prime is 225723747419. The next prime is 225723747437. The reversal of 225723747420 is 24747327522.

225723747420 is a `hidden beast` number, since 2 + 2 + 572 + 3 + 7 + 4 + 74 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1304380 + ... + 1467260.

It is an arithmetic number, because the mean of its divisors is an integer number (9510951450).

Almost surely, 2^225723747420 is an apocalyptic number.

225723747420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225723747420 is an abundant number, since it is smaller than the sum of its proper divisors (459064756980).

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

225723747420 is a wasteful number, since it uses less digits than its factorization.

225723747420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170595 (or 170590 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 45.

The spelling of 225723747420 in words is "two hundred twenty-five billion, seven hundred twenty-three million, seven hundred forty-seven thousand, four hundred twenty".