25520477 has 4 divisors (see below), whose sum is σ = 26863680. Its totient is φ = 24177276.

The previous prime is 25520437. The next prime is 25520479. The reversal of 25520477 is 77402552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25520477 - 2⁸ = 25520221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520479) 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, 671573 + ... + 671610.

It is an arithmetic number, because the mean of its divisors is an integer number (6715920).

Almost surely, 2^25520477 is an apocalyptic number.

It is an amenable number.

25520477 is a deficient number, since it is larger than the sum of its proper divisors (1343203).

25520477 is a wasteful number, since it uses less digits than its factorization.

25520477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343202.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 25520477 is about 5051.7795874325. The cubic root of 25520477 is about 294.4170312308.

The spelling of 25520477 in words is "twenty-five million, five hundred twenty thousand, four hundred seventy-seven".