25055501 has 4 divisors (see below), whose sum is σ = 26529372. Its totient is φ = 23581632.

The previous prime is 25055491. The next prime is 25055557. The reversal of 25055501 is 10555052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19811401 + 5244100 = 4451^2 + 2290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25055501 is a prime.

It is a super-2 number, since 2×25055501² = 1255556260722002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25055801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736910 + ... + 736943.

It is an arithmetic number, because the mean of its divisors is an integer number (6632343).

Almost surely, 2^25055501 is an apocalyptic number.

It is an amenable number.

25055501 is a deficient number, since it is larger than the sum of its proper divisors (1473871).

25055501 is a wasteful number, since it uses less digits than its factorization.

25055501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473870.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 25055501 is about 5005.5470230535. The cubic root of 25055501 is about 292.6179951048.

It can be divided in two parts, 25055 and 501, that multiplied together give a triangular number (12552555 = T₅₀₁₀).

The spelling of 25055501 in words is "twenty-five million, fifty-five thousand, five hundred one".