75495551 has 2 divisors, whose sum is σ = 75495552. Its totient is φ = 75495550.

The previous prime is 75495527. The next prime is 75495557. The reversal of 75495551 is 15559457.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75495551 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75495499 and 75495508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75495557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37747775 + 37747776.

It is an arithmetic number, because the mean of its divisors is an integer number (37747776).

Almost surely, 2^75495551 is an apocalyptic number.

75495551 is a deficient number, since it is larger than the sum of its proper divisors (1).

75495551 is an equidigital number, since it uses as much as digits as its factorization.

75495551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157500, while the sum is 41.

The square root of 75495551 is about 8688.8175835381. The cubic root of 75495551 is about 422.6431031417.

The spelling of 75495551 in words is "seventy-five million, four hundred ninety-five thousand, five hundred fifty-one".