75521051 has 2 divisors, whose sum is σ = 75521052. Its totient is φ = 75521050.

The previous prime is 75521041. The next prime is 75521081. The reversal of 75521051 is 15012557.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75521051 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75521051.

It is not a weakly prime, because it can be changed into another prime (75521011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37760525 + 37760526.

It is an arithmetic number, because the mean of its divisors is an integer number (37760526).

Almost surely, 2^75521051 is an apocalyptic number.

75521051 is a deficient number, since it is larger than the sum of its proper divisors (1).

75521051 is an equidigital number, since it uses as much as digits as its factorization.

75521051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 75521051 is about 8690.2848629950. The cubic root of 75521051 is about 422.6906829253.

The spelling of 75521051 in words is "seventy-five million, five hundred twenty-one thousand, fifty-one".