51069997 has 8 divisors (see below), whose sum is σ = 56476800. Its totient is φ = 45790560.

The previous prime is 51069973. The next prime is 51070007. The reversal of 51069997 is 79996015.

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-51069997 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 (51069937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30997 + ... + 32602.

It is an arithmetic number, because the mean of its divisors is an integer number (7059600).

Almost surely, 2^51069997 is an apocalyptic number.

It is an amenable number.

51069997 is a deficient number, since it is larger than the sum of its proper divisors (5406803).

51069997 is a wasteful number, since it uses less digits than its factorization.

51069997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63683.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 51069997 is about 7146.3275183831. The cubic root of 51069997 is about 371.0125588171.

It can be divided in two parts, 510 and 69997, that added together give a palindrome (70507).

The spelling of 51069997 in words is "fifty-one million, sixty-nine thousand, nine hundred ninety-seven".