51261336343 has 16 divisors (see below), whose sum is σ = 60278073856. Its totient is φ = 42679314720.

The previous prime is 51261336317. The next prime is 51261336361. The reversal of 51261336343 is 34363316215.

It is not a de Polignac number, because 51261336343 - 2¹⁷ = 51261205271 is a prime.

It is a super-2 number, since 2×51261336343² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51261330343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415971 + ... + 524932.

It is an arithmetic number, because the mean of its divisors is an integer number (3767379616).

Almost surely, 2^51261336343 is an apocalyptic number.

51261336343 is a deficient number, since it is larger than the sum of its proper divisors (9016737513).

51261336343 is a wasteful number, since it uses less digits than its factorization.

51261336343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941134.

The product of its digits is 116640, while the sum is 37.

The spelling of 51261336343 in words is "fifty-one billion, two hundred sixty-one million, three hundred thirty-six thousand, three hundred forty-three".