51093491 has 8 divisors (see below), whose sum is σ = 51616704. Its totient is φ = 50573160.

The previous prime is 51093479. The next prime is 51093499. The reversal of 51093491 is 19439015.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51093491 is a prime.

It is a super-2 number, since 2×51093491² = 5221089645134162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51093499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53480 + ... + 54426.

It is an arithmetic number, because the mean of its divisors is an integer number (6452088).

Almost surely, 2^51093491 is an apocalyptic number.

51093491 is a deficient number, since it is larger than the sum of its proper divisors (523213).

51093491 is a wasteful number, since it uses less digits than its factorization.

51093491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 51093491 is about 7147.9711107418. The cubic root of 51093491 is about 371.0694430497.

The spelling of 51093491 in words is "fifty-one million, ninety-three thousand, four hundred ninety-one".