51000133344 has 48 divisors (see below), whose sum is σ = 133887034512. Its totient is φ = 16998560768.

The previous prime is 51000133291. The next prime is 51000133397. The reversal of 51000133344 is 44333100015.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51000133291) and next prime (51000133397).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×51000133344² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1973692 + ... + 1999364.

It is an arithmetic number, because the mean of its divisors is an integer number (2789313219).

Almost surely, 2^51000133344 is an apocalyptic number.

It is an amenable number.

51000133344 is an abundant number, since it is smaller than the sum of its proper divisors (82886901168).

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

51000133344 is a wasteful number, since it uses less digits than its factorization.

51000133344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46379 (or 46371 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 51000133344 its reverse (44333100015), we get a palindrome (95333233359).

It can be divided in two parts, 510001 and 33344, that added together give a palindrome (543345).

The spelling of 51000133344 in words is "fifty-one billion, one hundred thirty-three thousand, three hundred forty-four".