51151611019 has 4 divisors (see below), whose sum is σ = 51230671344. Its totient is φ = 51072550696.

The previous prime is 51151611011. The next prime is 51151611059. The reversal of 51151611019 is 91011615115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51151611019 - 2³ = 51151611011 is a prime.

It is a super-2 number, since 2×51151611019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51151611011) 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, 39529192 + ... + 39530485.

It is an arithmetic number, because the mean of its divisors is an integer number (12807667836).

Almost surely, 2^51151611019 is an apocalyptic number.

51151611019 is a deficient number, since it is larger than the sum of its proper divisors (79060325).

51151611019 is an equidigital number, since it uses as much as digits as its factorization.

51151611019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79060324.

The product of its (nonzero) digits is 1350, while the sum is 31.

The spelling of 51151611019 in words is "fifty-one billion, one hundred fifty-one million, six hundred eleven thousand, nineteen".