51529471394 has 8 divisors (see below), whose sum is σ = 77614930668. Its totient is φ = 25657827840.

The previous prime is 51529471391. The next prime is 51529471439. The reversal of 51529471394 is 49317492515.

It can be written as a sum of positive squares in 2 ways, for example, as 50627250025 + 902221369 = 225005^2 + 30037^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51529471391) 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, 53453327 + ... + 53454290.

Almost surely, 2^51529471394 is an apocalyptic number.

51529471394 is a deficient number, since it is larger than the sum of its proper divisors (26085459274).

51529471394 is a wasteful number, since it uses less digits than its factorization.

51529471394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106907860.

The product of its digits is 1360800, while the sum is 50.

The spelling of 51529471394 in words is "fifty-one billion, five hundred twenty-nine million, four hundred seventy-one thousand, three hundred ninety-four".