1551402212251 has 2 divisors, whose sum is σ = 1551402212252. Its totient is φ = 1551402212250.

The previous prime is 1551402212219. The next prime is 1551402212263. The reversal of 1551402212251 is 1522122041551.

It is a strong prime.

It is an emirp because it is prime and its reverse (1522122041551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1551402212251 - 2⁵ = 1551402212219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551402212851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775701106125 + 775701106126.

It is an arithmetic number, because the mean of its divisors is an integer number (775701106126).

Almost surely, 2^{1551402212251} is an apocalyptic number.

1551402212251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551402212251 is an equidigital number, since it uses as much as digits as its factorization.

1551402212251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8000, while the sum is 31.

The spelling of 1551402212251 in words is "one trillion, five hundred fifty-one billion, four hundred two million, two hundred twelve thousand, two hundred fifty-one".