1000251313 has 4 divisors (see below), whose sum is σ = 1000397860. Its totient is φ = 1000104768.

The previous prime is 1000251277. The next prime is 1000251349. The reversal of 1000251313 is 3131520001.

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

It is an interprime number because it is at equal distance from previous prime (1000251277) and next prime (1000251349).

It can be written as a sum of positive squares in 2 ways, for example, as 573746209 + 426505104 = 23953^2 + 20652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000251313 - 2¹³ = 1000243121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000251353) 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, 62508 + ... + 76861.

It is an arithmetic number, because the mean of its divisors is an integer number (250099465).

Almost surely, 2^1000251313 is an apocalyptic number.

It is an amenable number.

1000251313 is a deficient number, since it is larger than the sum of its proper divisors (146547).

1000251313 is an equidigital number, since it uses as much as digits as its factorization.

1000251313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146546.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1000251313 is about 31626.7499594884. The cubic root of 1000251313 is about 1000.0837639834.

Adding to 1000251313 its reverse (3131520001), we get a palindrome (4131771314).

The spelling of 1000251313 in words is "one billion, two hundred fifty-one thousand, three hundred thirteen".