971501131 has 4 divisors (see below), whose sum is σ = 1005001200. Its totient is φ = 938001064.

The previous prime is 971501129. The next prime is 971501137. The reversal of 971501131 is 131105179.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 971501131 - 2¹ = 971501129 is a prime.

It is a super-2 number, since 2×971501131² = 1887628895068558322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 971501131.

It is not an unprimeable number, because it can be changed into a prime (971501137) 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, 16749991 + ... + 16750048.

It is an arithmetic number, because the mean of its divisors is an integer number (251250300).

Almost surely, 2^971501131 is an apocalyptic number.

971501131 is a deficient number, since it is larger than the sum of its proper divisors (33500069).

971501131 is a wasteful number, since it uses less digits than its factorization.

971501131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33500068.

The product of its (nonzero) digits is 945, while the sum is 28.

The square root of 971501131 is about 31168.9128941001. The cubic root of 971501131 is about 990.4086776485.

The spelling of 971501131 in words is "nine hundred seventy-one million, five hundred one thousand, one hundred thirty-one".