1025203513 has 6 divisors (see below), whose sum is σ = 1089057326. Its totient is φ = 964897152.

The previous prime is 1025203499. The next prime is 1025203523. The reversal of 1025203513 is 3153025201.

It can be written as a sum of positive squares in 3 ways, for example, as 243609664 + 781593849 = 15608^2 + 27957^2 .

It is not a de Polignac number, because 1025203513 - 2¹³ = 1025195321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025203523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1773420 + ... + 1773997.

Almost surely, 2^1025203513 is an apocalyptic number.

It is an amenable number.

1025203513 is a deficient number, since it is larger than the sum of its proper divisors (63853813).

1025203513 is an equidigital number, since it uses as much as digits as its factorization.

1025203513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547451 (or 3547434 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1025203513 is about 32018.7993684960. The cubic root of 1025203513 is about 1008.3315632751.

Adding to 1025203513 its reverse (3153025201), we get a palindrome (4178228714).

The spelling of 1025203513 in words is "one billion, twenty-five million, two hundred three thousand, five hundred thirteen".