51520475302 has 4 divisors (see below), whose sum is σ = 77280712956. Its totient is φ = 25760237650.

The previous prime is 51520475291. The next prime is 51520475317. The reversal of 51520475302 is 20357402515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20357402515 = 5 ⋅4071480503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12880118824 + ... + 12880118827.

It is an arithmetic number, because the mean of its divisors is an integer number (19320178239).

Almost surely, 2^51520475302 is an apocalyptic number.

51520475302 is a deficient number, since it is larger than the sum of its proper divisors (25760237654).

51520475302 is a wasteful number, since it uses less digits than its factorization.

51520475302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25760237653.

The product of its (nonzero) digits is 42000, while the sum is 34.

Adding to 51520475302 its reverse (20357402515), we get a palindrome (71877877817).

The spelling of 51520475302 in words is "fifty-one billion, five hundred twenty million, four hundred seventy-five thousand, three hundred two".