1152157931 has 4 divisors (see below), whose sum is σ = 1154082000. Its totient is φ = 1150233864.

The previous prime is 1152157927. The next prime is 1152157939. The reversal of 1152157931 is 1397512511.

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 1152157931 - 2² = 1152157927 is a prime.

It is a super-2 number, since 2×1152157931² = 2654935795932401522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1152157891 and 1152157900.

It is not an unprimeable number, because it can be changed into a prime (1152157939) 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, 961136 + ... + 962333.

It is an arithmetic number, because the mean of its divisors is an integer number (288520500).

Almost surely, 2^1152157931 is an apocalyptic number.

1152157931 is a deficient number, since it is larger than the sum of its proper divisors (1924069).

1152157931 is an equidigital number, since it uses as much as digits as its factorization.

1152157931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924068.

The product of its digits is 9450, while the sum is 35.

The square root of 1152157931 is about 33943.4519605770. The cubic root of 1152157931 is about 1048.3444601600.

The spelling of 1152157931 in words is "one billion, one hundred fifty-two million, one hundred fifty-seven thousand, nine hundred thirty-one".