51219353841 has 4 divisors (see below), whose sum is σ = 68292471792. Its totient is φ = 34146235892.

The previous prime is 51219353831. The next prime is 51219353863. The reversal of 51219353841 is 14835391215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51219353841 - 2¹¹ = 51219351793 is a prime.

It is a super-2 number, since 2×51219353841² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51219353793 and 51219353802.

It is not an unprimeable number, because it can be changed into a prime (51219353831) 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, 8536558971 + ... + 8536558976.

It is an arithmetic number, because the mean of its divisors is an integer number (17073117948).

Almost surely, 2^51219353841 is an apocalyptic number.

It is an amenable number.

51219353841 is a deficient number, since it is larger than the sum of its proper divisors (17073117951).

51219353841 is a wasteful number, since it uses less digits than its factorization.

51219353841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17073117950.

The product of its digits is 129600, while the sum is 42.

The spelling of 51219353841 in words is "fifty-one billion, two hundred nineteen million, three hundred fifty-three thousand, eight hundred forty-one".