51025890 has 32 divisors (see below), whose sum is σ = 124474176. Its totient is φ = 13383360.

The previous prime is 51025889. The next prime is 51025901. The reversal of 51025890 is 9852015.

51025890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12112 + ... + 15771.

It is an arithmetic number, because the mean of its divisors is an integer number (3889818).

Almost surely, 2^51025890 is an apocalyptic number.

51025890 is an abundant number, since it is smaller than the sum of its proper divisors (73448286).

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

51025890 is a wasteful number, since it uses less digits than its factorization.

51025890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27954.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 51025890 is about 7143.2408611218. The cubic root of 51025890 is about 370.9057187598.

It can be divided in two parts, 51025 and 890, that added together give a palindrome (51915).

The spelling of 51025890 in words is "fifty-one million, twenty-five thousand, eight hundred ninety".