1011631253 has 4 divisors (see below), whose sum is σ = 1036305228. Its totient is φ = 986957280.

The previous prime is 1011631237. The next prime is 1011631267. The reversal of 1011631253 is 3521361101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26801329 + 984829924 = 5177^2 + 31382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011631253 - 2⁴ = 1011631237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011631213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12336926 + ... + 12337007.

It is an arithmetic number, because the mean of its divisors is an integer number (259076307).

Almost surely, 2^1011631253 is an apocalyptic number.

It is an amenable number.

1011631253 is a deficient number, since it is larger than the sum of its proper divisors (24673975).

1011631253 is an equidigital number, since it uses as much as digits as its factorization.

1011631253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24673974.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1011631253 is about 31806.1511818076. The cubic root of 1011631253 is about 1003.8621489361.

Adding to 1011631253 its reverse (3521361101), we get a palindrome (4532992354).

The spelling of 1011631253 in words is "one billion, eleven million, six hundred thirty-one thousand, two hundred fifty-three".