1031171157 has 12 divisors (see below), whose sum is σ = 1489849504. Its totient is φ = 687272040.

The previous prime is 1031171153. The next prime is 1031171161. The reversal of 1031171157 is 7511711301.

It is an interprime number because it is at equal distance from previous prime (1031171153) and next prime (1031171161).

It is not a de Polignac number, because 1031171157 - 2² = 1031171153 is a prime.

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 1031171157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031171153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29682 + ... + 54252.

Almost surely, 2^1031171157 is an apocalyptic number.

It is an amenable number.

1031171157 is a deficient number, since it is larger than the sum of its proper divisors (458678347).

1031171157 is a wasteful number, since it uses less digits than its factorization.

1031171157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29240 (or 29237 counting only the distinct ones).

The product of its (nonzero) digits is 735, while the sum is 27.

The square root of 1031171157 is about 32111.8538393535. The cubic root of 1031171157 is about 1010.2842571469.

Adding to 1031171157 its reverse (7511711301), we get a palindrome (8542882458).

The spelling of 1031171157 in words is "one billion, thirty-one million, one hundred seventy-one thousand, one hundred fifty-seven".