51040342 has 4 divisors (see below), whose sum is σ = 76560516. Its totient is φ = 25520170.

The previous prime is 51040331. The next prime is 51040373. The reversal of 51040342 is 24304015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24304015 = 5 ⋅4860803.

It is a super-2 number, since 2×51040342² = 5210233022953928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12760084 + ... + 12760087.

It is an arithmetic number, because the mean of its divisors is an integer number (19140129).

Almost surely, 2^51040342 is an apocalyptic number.

51040342 is a deficient number, since it is larger than the sum of its proper divisors (25520174).

51040342 is a wasteful number, since it uses less digits than its factorization.

51040342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25520173.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 51040342 is about 7144.2523751614. The cubic root of 51040342 is about 370.9407325110.

Adding to 51040342 its reverse (24304015), we get a palindrome (75344357).

The spelling of 51040342 in words is "fifty-one million, forty thousand, three hundred forty-two".