51035330042021 has 4 divisors (see below), whose sum is σ = 54961124660652. Its totient is φ = 47109535423392.

The previous prime is 51035330041957. The next prime is 51035330042057. The reversal of 51035330042021 is 12024003353015.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20349391660900 + 30685938381121 = 4511030^2 + 5539489^2 .

It is not a de Polignac number, because 51035330042021 - 2⁶ = 51035330041957 is a prime.

It is a super-2 number, since 2×51035330042021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51035330042321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962897309296 + ... + 1962897309321.

It is an arithmetic number, because the mean of its divisors is an integer number (13740281165163).

Almost surely, 2^{51035330042021} is an apocalyptic number.

It is an amenable number.

51035330042021 is a deficient number, since it is larger than the sum of its proper divisors (3925794618631).

51035330042021 is a wasteful number, since it uses less digits than its factorization.

51035330042021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925794618630.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 51035330042021 its reverse (12024003353015), we get a palindrome (63059333395036).

The spelling of 51035330042021 in words is "fifty-one trillion, thirty-five billion, three hundred thirty million, forty-two thousand, twenty-one".