1031255161 has 4 divisors (see below), whose sum is σ = 1031663232. Its totient is φ = 1030847092.

The previous prime is 1031255149. The next prime is 1031255201. The reversal of 1031255161 is 1615521301.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1031255161 - 2¹⁷ = 1031124089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031255461) 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, 200221 + ... + 205306.

It is an arithmetic number, because the mean of its divisors is an integer number (257915808).

Almost surely, 2^1031255161 is an apocalyptic number.

It is an amenable number.

1031255161 is a deficient number, since it is larger than the sum of its proper divisors (408071).

1031255161 is an equidigital number, since it uses as much as digits as its factorization.

1031255161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408070.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1031255161 is about 32113.1618032233. The cubic root of 1031255161 is about 1010.3116905539.

Adding to 1031255161 its reverse (1615521301), we get a palindrome (2646776462).

The spelling of 1031255161 in words is "one billion, thirty-one million, two hundred fifty-five thousand, one hundred sixty-one".