51493347 has 12 divisors (see below), whose sum is σ = 76341720. Its totient is φ = 34304040.

The previous prime is 51493313. The next prime is 51493367. The reversal of 51493347 is 74339415.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 51493347 - 2⁷ = 51493219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51493367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36597 + ... + 37977.

It is an arithmetic number, because the mean of its divisors is an integer number (6361810).

Almost surely, 2^51493347 is an apocalyptic number.

51493347 is a deficient number, since it is larger than the sum of its proper divisors (24848373).

51493347 is an frugal number, since it uses more digits than its factorization.

51493347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771 (or 1384 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 51493347 is about 7175.8864957579. The cubic root of 51493347 is about 372.0349212794.

The spelling of 51493347 in words is "fifty-one million, four hundred ninety-three thousand, three hundred forty-seven".