1551005252387 has 2 divisors, whose sum is σ = 1551005252388. Its totient is φ = 1551005252386.

The previous prime is 1551005252317. The next prime is 1551005252443. The reversal of 1551005252387 is 7832525001551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1551005252387 - 2⁸ = 1551005252131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551005252317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775502626193 + 775502626194.

It is an arithmetic number, because the mean of its divisors is an integer number (775502626194).

Almost surely, 2^{1551005252387} is an apocalyptic number.

1551005252387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551005252387 is an equidigital number, since it uses as much as digits as its factorization.

1551005252387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420000, while the sum is 44.

The spelling of 1551005252387 in words is "one trillion, five hundred fifty-one billion, five million, two hundred fifty-two thousand, three hundred eighty-seven".