1995056551 has 2 divisors, whose sum is σ = 1995056552. Its totient is φ = 1995056550.

The previous prime is 1995056519. The next prime is 1995056561. The reversal of 1995056551 is 1556505991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1995056551 - 2⁵ = 1995056519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1995056561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997528275 + 997528276.

It is an arithmetic number, because the mean of its divisors is an integer number (997528276).

Almost surely, 2^1995056551 is an apocalyptic number.

1995056551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995056551 is an equidigital number, since it uses as much as digits as its factorization.

1995056551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 303750, while the sum is 46.

The square root of 1995056551 is about 44666.0559149787. The cubic root of 1995056551 is about 1258.8821342106.

The spelling of 1995056551 in words is "one billion, nine hundred ninety-five million, fifty-six thousand, five hundred fifty-one".