51342081 has 16 divisors (see below), whose sum is σ = 78336000. Its totient is φ = 29300688.

The previous prime is 51342079. The next prime is 51342089. The reversal of 51342081 is 18024315.

It is not a de Polignac number, because 51342081 - 2¹ = 51342079 is a prime.

It is a super-2 number, since 2×51342081² = 5272018562821122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51342089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29370 + ... + 31068.

It is an arithmetic number, because the mean of its divisors is an integer number (4896000).

Almost surely, 2^51342081 is an apocalyptic number.

It is an amenable number.

51342081 is a deficient number, since it is larger than the sum of its proper divisors (26993919).

51342081 is a wasteful number, since it uses less digits than its factorization.

51342081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51342081 is about 7165.3388614915. The cubic root of 51342081 is about 371.6702694479.

Adding to 51342081 its reverse (18024315), we get a palindrome (69366396).

The spelling of 51342081 in words is "fifty-one million, three hundred forty-two thousand, eighty-one".