25350551 has 4 divisors (see below), whose sum is σ = 25479432. Its totient is φ = 25221672.

The previous prime is 25350539. The next prime is 25350557. The reversal of 25350551 is 15505352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25350551 - 2¹⁴ = 25334167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25350551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25350557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64145 + ... + 64538.

It is an arithmetic number, because the mean of its divisors is an integer number (6369858).

Almost surely, 2^25350551 is an apocalyptic number.

25350551 is a deficient number, since it is larger than the sum of its proper divisors (128881).

25350551 is a wasteful number, since it uses less digits than its factorization.

25350551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128880.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 25350551 is about 5034.9330680755. The cubic root of 25350551 is about 293.7621249862.

The spelling of 25350551 in words is "twenty-five million, three hundred fifty thousand, five hundred fifty-one".