1051505231 has 4 divisors (see below), whose sum is σ = 1201720272. Its totient is φ = 901290192.

The previous prime is 1051505227. The next prime is 1051505269. The reversal of 1051505231 is 1325051501.

It is a happy number.

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 1051505231 - 2² = 1051505227 is a prime.

It is a super-2 number, since 2×1051505231² = 2211326501640726722, 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 = 1051505197 and 1051505206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051505731) 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, 75107510 + ... + 75107523.

It is an arithmetic number, because the mean of its divisors is an integer number (300430068).

Almost surely, 2^1051505231 is an apocalyptic number.

1051505231 is a deficient number, since it is larger than the sum of its proper divisors (150215041).

1051505231 is an equidigital number, since it uses as much as digits as its factorization.

1051505231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150215040.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1051505231 is about 32426.9213925713. The cubic root of 1051505231 is about 1016.8818110423.

Adding to 1051505231 its reverse (1325051501), we get a palindrome (2376556732).

The spelling of 1051505231 in words is "one billion, fifty-one million, five hundred five thousand, two hundred thirty-one".