25223550 has 48 divisors (see below), whose sum is σ = 68245632. Its totient is φ = 6114400.

The previous prime is 25223509. The next prime is 25223551. The reversal of 25223550 is 5532252.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25223550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25223551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5994 + ... + 9293.

It is an arithmetic number, because the mean of its divisors is an integer number (1421784).

Almost surely, 2^25223550 is an apocalyptic number.

25223550 is an abundant number, since it is smaller than the sum of its proper divisors (43022082).

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

25223550 is a wasteful number, since it uses less digits than its factorization.

25223550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15313 (or 15308 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 25223550 is about 5022.3052475930. The cubic root of 25223550 is about 293.2707410640.

The spelling of 25223550 in words is "twenty-five million, two hundred twenty-three thousand, five hundred fifty".