51251497 has 8 divisors (see below), whose sum is σ = 57839040. Its totient is φ = 44985360.

The previous prime is 51251491. The next prime is 51251527. The reversal of 51251497 is 79415215.

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-51251497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51251491) 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, 80013 + ... + 80650.

It is an arithmetic number, because the mean of its divisors is an integer number (7229880).

Almost surely, 2^51251497 is an apocalyptic number.

It is an amenable number.

51251497 is a deficient number, since it is larger than the sum of its proper divisors (6587543).

51251497 is a wasteful number, since it uses less digits than its factorization.

51251497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160703.

The product of its digits is 12600, while the sum is 34.

The square root of 51251497 is about 7159.0150858900. The cubic root of 51251497 is about 371.4515586717.

The spelling of 51251497 in words is "fifty-one million, two hundred fifty-one thousand, four hundred ninety-seven".