15751521551 has 2 divisors, whose sum is σ = 15751521552. Its totient is φ = 15751521550.

The previous prime is 15751521529. The next prime is 15751521629. The reversal of 15751521551 is 15512515751.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15751521551 is a prime.

It is a super-2 number, since 2×15751521551² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15751523551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7875760775 + 7875760776.

It is an arithmetic number, because the mean of its divisors is an integer number (7875760776).

Almost surely, 2^15751521551 is an apocalyptic number.

15751521551 is a deficient number, since it is larger than the sum of its proper divisors (1).

15751521551 is an equidigital number, since it uses as much as digits as its factorization.

15751521551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43750, while the sum is 38.

The spelling of 15751521551 in words is "fifteen billion, seven hundred fifty-one million, five hundred twenty-one thousand, five hundred fifty-one".