51291845 has 8 divisors (see below), whose sum is σ = 67145760. Its totient is φ = 37303120.

The previous prime is 51291797. The next prime is 51291847. The reversal of 51291845 is 54819215.

51291845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51291845 - 2⁶ = 51291781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51291847) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 466235 + ... + 466344.

It is an arithmetic number, because the mean of its divisors is an integer number (8393220).

Almost surely, 2^51291845 is an apocalyptic number.

51291845 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51291845 is a deficient number, since it is larger than the sum of its proper divisors (15853915).

51291845 is a wasteful number, since it uses less digits than its factorization.

51291845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932595.

The product of its digits is 14400, while the sum is 35.

The square root of 51291845 is about 7161.8325168912. The cubic root of 51291845 is about 371.5490088090.

The spelling of 51291845 in words is "fifty-one million, two hundred ninety-one thousand, eight hundred forty-five".