15506051051 has 2 divisors, whose sum is σ = 15506051052. Its totient is φ = 15506051050.

The previous prime is 15506051039. The next prime is 15506051111. The reversal of 15506051051 is 15015060551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15506051051 - 2¹⁴ = 15506034667 is a prime.

It is not a weakly prime, because it can be changed into another prime (15506051021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7753025525 + 7753025526.

It is an arithmetic number, because the mean of its divisors is an integer number (7753025526).

Almost surely, 2^15506051051 is an apocalyptic number.

15506051051 is a deficient number, since it is larger than the sum of its proper divisors (1).

15506051051 is an equidigital number, since it uses as much as digits as its factorization.

15506051051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 15506051051 in words is "fifteen billion, five hundred six million, fifty-one thousand, fifty-one".