7955551 has 2 divisors, whose sum is σ = 7955552. Its totient is φ = 7955550.

The previous prime is 7955543. The next prime is 7955567. The reversal of 7955551 is 1555597.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7955551 - 2³ = 7955543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7955551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7955581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3977775 + 3977776.

It is an arithmetic number, because the mean of its divisors is an integer number (3977776).

Almost surely, 2^7955551 is an apocalyptic number.

7955551 is a deficient number, since it is larger than the sum of its proper divisors (1).

7955551 is an equidigital number, since it uses as much as digits as its factorization.

7955551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39375, while the sum is 37.

The square root of 7955551 is about 2820.5586326116. The cubic root of 7955551 is about 199.6289035296.

The spelling of 7955551 in words is "seven million, nine hundred fifty-five thousand, five hundred fifty-one".