51552121311 has 24 divisors (see below), whose sum is σ = 74750332176. Its totient is φ = 34236259200.

The previous prime is 51552121307. The next prime is 51552121351. The reversal of 51552121311 is 11312125515.

It is a happy number.

51552121311 is a `hidden beast` number, since 5 + 1 + 5 + 521 + 2 + 131 + 1 = 666.

It is not a de Polignac number, because 51552121311 - 2² = 51552121307 is a prime.

It is a super-3 number, since 3×51552121311³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51552121301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2593611 + ... + 2613411.

It is an arithmetic number, because the mean of its divisors is an integer number (3114597174).

Almost surely, 2^51552121311 is an apocalyptic number.

51552121311 is a deficient number, since it is larger than the sum of its proper divisors (23198210865).

51552121311 is a wasteful number, since it uses less digits than its factorization.

51552121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20903 (or 20900 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

Adding to 51552121311 its reverse (11312125515), we get a palindrome (62864246826).

The spelling of 51552121311 in words is "fifty-one billion, five hundred fifty-two million, one hundred twenty-one thousand, three hundred eleven".