25555830 has 32 divisors (see below), whose sum is σ = 61689600. Its totient is φ = 6775392.

The previous prime is 25555819. The next prime is 25555841. The reversal of 25555830 is 3855552.

It is an interprime number because it is at equal distance from previous prime (25555819) and next prime (25555841).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25555791 and 25555800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991 + ... + 7749.

It is an arithmetic number, because the mean of its divisors is an integer number (1927800).

Almost surely, 2^25555830 is an apocalyptic number.

25555830 is an abundant number, since it is smaller than the sum of its proper divisors (36133770).

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

25555830 is a wasteful number, since it uses less digits than its factorization.

25555830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4948.

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 25555830 is about 5055.2774404576. The cubic root of 25555830 is about 294.5529184866.

It can be divided in two parts, 2555 and 5830, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 25555830 in words is "twenty-five million, five hundred fifty-five thousand, eight hundred thirty".