51007197 has 8 divisors (see below), whose sum is σ = 68090656. Its totient is φ = 33964272.

The previous prime is 51007193. The next prime is 51007199. The reversal of 51007197 is 79170015.

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

It is not a de Polignac number, because 51007197 - 2² = 51007193 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 (51007193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7063 + ... + 12324.

It is an arithmetic number, because the mean of its divisors is an integer number (8511332).

Almost surely, 2^51007197 is an apocalyptic number.

It is an amenable number.

51007197 is a deficient number, since it is larger than the sum of its proper divisors (17083459).

51007197 is a wasteful number, since it uses less digits than its factorization.

51007197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20267.

The product of its (nonzero) digits is 2205, while the sum is 30.

The square root of 51007197 is about 7141.9323015554. The cubic root of 51007197 is about 370.8604202689.

The spelling of 51007197 in words is "fifty-one million, seven thousand, one hundred ninety-seven".