55025681 has 4 divisors (see below), whose sum is σ = 56305392. Its totient is φ = 53745972.

The previous prime is 55025669. The next prime is 55025717. The reversal of 55025681 is 18652055.

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 55025681 - 2¹⁸ = 54763537 is a prime.

It is a super-2 number, since 2×55025681² = 6055651139027522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55025081) 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, 639791 + ... + 639876.

It is an arithmetic number, because the mean of its divisors is an integer number (14076348).

Almost surely, 2^55025681 is an apocalyptic number.

It is an amenable number.

55025681 is a deficient number, since it is larger than the sum of its proper divisors (1279711).

55025681 is a wasteful number, since it uses less digits than its factorization.

55025681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279710.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 55025681 is about 7417.9296976987. The cubic root of 55025681 is about 380.3544269401.

The spelling of 55025681 in words is "fifty-five million, twenty-five thousand, six hundred eighty-one".