75216157 has 2 divisors, whose sum is σ = 75216158. Its totient is φ = 75216156.

The previous prime is 75216149. The next prime is 75216173. The reversal of 75216157 is 75161257.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44235801 + 30980356 = 6651^2 + 5566^2 .

It is a cyclic number.

It is not a de Polignac number, because 75216157 - 2³ = 75216149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75216107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37608078 + 37608079.

It is an arithmetic number, because the mean of its divisors is an integer number (37608079).

Almost surely, 2^75216157 is an apocalyptic number.

It is an amenable number.

75216157 is a deficient number, since it is larger than the sum of its proper divisors (1).

75216157 is an equidigital number, since it uses as much as digits as its factorization.

75216157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 34.

The square root of 75216157 is about 8672.7248889839. The cubic root of 75216157 is about 422.1210859975.

The spelling of 75216157 in words is "seventy-five million, two hundred sixteen thousand, one hundred fifty-seven".