51158493 has 16 divisors (see below), whose sum is σ = 75937600. Its totient is φ = 34039440.

The previous prime is 51158489. The next prime is 51158501. The reversal of 51158493 is 39485115.

51158493 is a `hidden beast` number, since 511 + 58 + 4 + 93 = 666.

It is not a de Polignac number, because 51158493 - 2² = 51158489 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 (51158413) 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, 15183 + ... + 18243.

It is an arithmetic number, because the mean of its divisors is an integer number (4746100).

Almost surely, 2^51158493 is an apocalyptic number.

It is an amenable number.

51158493 is a deficient number, since it is larger than the sum of its proper divisors (24779107).

51158493 is a wasteful number, since it uses less digits than its factorization.

51158493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689 (or 3683 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 51158493 is about 7152.5165501381. The cubic root of 51158493 is about 371.2267366302.

The spelling of 51158493 in words is "fifty-one million, one hundred fifty-eight thousand, four hundred ninety-three".