75217157 has 4 divisors (see below), whose sum is σ = 75254400. Its totient is φ = 75179916.

The previous prime is 75217151. The next prime is 75217159. The reversal of 75217157 is 75171257.

It is a happy number.

75217157 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75171257 = 7 ⋅10738751.

It is a cyclic number.

It is not a de Polignac number, because 75217157 - 2⁴ = 75217141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75217151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15407 + ... + 19692.

It is an arithmetic number, because the mean of its divisors is an integer number (18813600).

Almost surely, 2^75217157 is an apocalyptic number.

It is an amenable number.

75217157 is a deficient number, since it is larger than the sum of its proper divisors (37243).

75217157 is a wasteful number, since it uses less digits than its factorization.

75217157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37242.

The product of its digits is 17150, while the sum is 35.

The square root of 75217157 is about 8672.7825407997. The cubic root of 75217157 is about 422.1229566914.

The spelling of 75217157 in words is "seventy-five million, two hundred seventeen thousand, one hundred fifty-seven".