51020742 has 32 divisors (see below), whose sum is σ = 104129280. Its totient is φ = 16662240.

The previous prime is 51020731. The next prime is 51020777. The reversal of 51020742 is 24702015.

It is a super-2 number, since 2×51020742² = 5206232228461128, 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 in 15 ways as a sum of consecutive naturals, for example, 97293 + ... + 97815.

It is an arithmetic number, because the mean of its divisors is an integer number (3254040).

Almost surely, 2^51020742 is an apocalyptic number.

51020742 is an abundant number, since it is smaller than the sum of its proper divisors (53108538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51020742 is a wasteful number, since it uses less digits than its factorization.

51020742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 51020742 is about 7142.8805113903. The cubic root of 51020742 is about 370.8932447859.

Adding to 51020742 its reverse (24702015), we get a palindrome (75722757).

The spelling of 51020742 in words is "fifty-one million, twenty thousand, seven hundred forty-two".