225054723621 has 16 divisors (see below), whose sum is σ = 369320572544. Its totient is φ = 118710183744.

The previous prime is 225054723613. The next prime is 225054723629. The reversal of 225054723621 is 126327450522.

It is an interprime number because it is at equal distance from previous prime (225054723613) and next prime (225054723629).

It is not a de Polignac number, because 225054723621 - 2³ = 225054723613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 225054723621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225054723629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412187866 + ... + 412188411.

It is an arithmetic number, because the mean of its divisors is an integer number (23082535784).

Almost surely, 2^225054723621 is an apocalyptic number.

225054723621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

225054723621 is a deficient number, since it is larger than the sum of its proper divisors (144265848923).

225054723621 is a wasteful number, since it uses less digits than its factorization.

225054723621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824376300.

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 225054723621 in words is "two hundred twenty-five billion, fifty-four million, seven hundred twenty-three thousand, six hundred twenty-one".