51361797 has 8 divisors (see below), whose sum is σ = 68878944. Its totient is φ = 34042928.

The previous prime is 51361763. The next prime is 51361799. The reversal of 51361797 is 79716315.

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

It is a cyclic number.

It is not a de Polignac number, because 51361797 - 2¹² = 51357701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51361799) 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, 48963 + ... + 50000.

It is an arithmetic number, because the mean of its divisors is an integer number (8609868).

Almost surely, 2^51361797 is an apocalyptic number.

It is an amenable number.

51361797 is a deficient number, since it is larger than the sum of its proper divisors (17517147).

51361797 is a wasteful number, since it uses less digits than its factorization.

51361797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99139.

The product of its digits is 39690, while the sum is 39.

The square root of 51361797 is about 7166.7145192201. The cubic root of 51361797 is about 371.7178387003.

The spelling of 51361797 in words is "fifty-one million, three hundred sixty-one thousand, seven hundred ninety-seven".