51021211144 has 64 divisors (see below), whose sum is σ = 102413808000. Its totient is φ = 23770222080.

The previous prime is 51021211127. The next prime is 51021211183. The reversal of 51021211144 is 44111212015.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5343927 + ... + 5353465.

It is an arithmetic number, because the mean of its divisors is an integer number (1600215750).

Almost surely, 2^51021211144 is an apocalyptic number.

It is an amenable number.

51021211144 is an abundant number, since it is smaller than the sum of its proper divisors (51392596856).

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

51021211144 is a wasteful number, since it uses less digits than its factorization.

51021211144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10318 (or 10314 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 51021211144 its reverse (44111212015), we get a palindrome (95132423159).

The spelling of 51021211144 in words is "fifty-one billion, twenty-one million, two hundred eleven thousand, one hundred forty-four".