51553437427 has 4 divisors (see below), whose sum is σ = 51564526456. Its totient is φ = 51542348400.

The previous prime is 51553437367. The next prime is 51553437461. The reversal of 51553437427 is 72473435515.

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 51553437427 - 2¹⁵ = 51553404659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51553437487) 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, 5537538 + ... + 5546839.

It is an arithmetic number, because the mean of its divisors is an integer number (12891131614).

Almost surely, 2^51553437427 is an apocalyptic number.

51553437427 is a deficient number, since it is larger than the sum of its proper divisors (11089029).

51553437427 is a wasteful number, since it uses less digits than its factorization.

51553437427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11089028.

The product of its digits is 1764000, while the sum is 46.

The spelling of 51553437427 in words is "fifty-one billion, five hundred fifty-three million, four hundred thirty-seven thousand, four hundred twenty-seven".