51481090 has 32 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 19744704.

The previous prime is 51481081. The next prime is 51481093. The reversal of 51481090 is 9018415.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51481093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47899 + ... + 48961.

It is an arithmetic number, because the mean of its divisors is an integer number (3016440).

Almost surely, 2^51481090 is an apocalyptic number.

51481090 is a deficient number, since it is larger than the sum of its proper divisors (45044990).

51481090 is a wasteful number, since it uses less digits than its factorization.

51481090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 51481090 is about 7175.0324041080. The cubic root of 51481090 is about 372.0054003533.

The spelling of 51481090 in words is "fifty-one million, four hundred eighty-one thousand, ninety".