51623455151 has 4 divisors (see below), whose sum is σ = 51624281904. Its totient is φ = 51622628400.

The previous prime is 51623455123. The next prime is 51623455159. The reversal of 51623455151 is 15155432615.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51623455151 is a prime.

It is a super-2 number, since 2×51623455151² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51623455159) 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, 311315 + ... + 447396.

It is an arithmetic number, because the mean of its divisors is an integer number (12906070476).

Almost surely, 2^51623455151 is an apocalyptic number.

51623455151 is a deficient number, since it is larger than the sum of its proper divisors (826753).

51623455151 is an equidigital number, since it uses as much as digits as its factorization.

51623455151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826752.

The product of its digits is 90000, while the sum is 38.

Adding to 51623455151 its reverse (15155432615), we get a palindrome (66778887766).

The spelling of 51623455151 in words is "fifty-one billion, six hundred twenty-three million, four hundred fifty-five thousand, one hundred fifty-one".