51051531401 has 4 divisors (see below), whose sum is σ = 54978572292. Its totient is φ = 47124490512.

The previous prime is 51051531379. The next prime is 51051531409. The reversal of 51051531401 is 10413515015.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31417917001 + 19633614400 = 177251^2 + 140120^2 .

It is a cyclic number.

It is not a de Polignac number, because 51051531401 - 2⁶ = 51051531337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51051531409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1963520426 + ... + 1963520451.

It is an arithmetic number, because the mean of its divisors is an integer number (13744643073).

Almost surely, 2^51051531401 is an apocalyptic number.

It is an amenable number.

51051531401 is a deficient number, since it is larger than the sum of its proper divisors (3927040891).

51051531401 is a wasteful number, since it uses less digits than its factorization.

51051531401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927040890.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 51051531401 in words is "fifty-one billion, fifty-one million, five hundred thirty-one thousand, four hundred one".