51481045 has 16 divisors (see below), whose sum is σ = 77021568. Its totient is φ = 32091840.

The previous prime is 51481043. The next prime is 51481063. The reversal of 51481045 is 54018415.

It is not a de Polignac number, because 51481045 - 2¹ = 51481043 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 (51481043) 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, 66474 + ... + 67243.

It is an arithmetic number, because the mean of its divisors is an integer number (4813848).

Almost surely, 2^51481045 is an apocalyptic number.

51481045 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51481045 is a deficient number, since it is larger than the sum of its proper divisors (25540523).

51481045 is a wasteful number, since it uses less digits than its factorization.

51481045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133740.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 51481045 is about 7175.0292682330. The cubic root of 51481045 is about 372.0052919623.

The spelling of 51481045 in words is "fifty-one million, four hundred eighty-one thousand, forty-five".