51213663403 has 8 divisors (see below), whose sum is σ = 58541980640. Its totient is φ = 43888366080.

The previous prime is 51213663401. The next prime is 51213663419. The reversal of 51213663403 is 30436631215.

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

It is a cyclic number.

It is not a de Polignac number, because 51213663403 - 2¹ = 51213663401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51213663401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718518 + ... + 786571.

It is an arithmetic number, because the mean of its divisors is an integer number (7317747580).

Almost surely, 2^51213663403 is an apocalyptic number.

51213663403 is a deficient number, since it is larger than the sum of its proper divisors (7328317237).

51213663403 is a wasteful number, since it uses less digits than its factorization.

51213663403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509957.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 51213663403 in words is "fifty-one billion, two hundred thirteen million, six hundred sixty-three thousand, four hundred three".