2551415212091 has 2 divisors, whose sum is σ = 2551415212092. Its totient is φ = 2551415212090.

The previous prime is 2551415212069. The next prime is 2551415212109. The reversal of 2551415212091 is 1902125141552.

It is a happy number.

Together with next prime (2551415212109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2551415212091 is a prime.

It is not a weakly prime, because it can be changed into another prime (2551415212051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275707606045 + 1275707606046.

It is an arithmetic number, because the mean of its divisors is an integer number (1275707606046).

Almost surely, 2^{2551415212091} is an apocalyptic number.

2551415212091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551415212091 is an equidigital number, since it uses as much as digits as its factorization.

2551415212091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 2551415212091 in words is "two trillion, five hundred fifty-one billion, four hundred fifteen million, two hundred twelve thousand, ninety-one".