1025211553 has 4 divisors (see below), whose sum is σ = 1042588080. Its totient is φ = 1007835028.

The previous prime is 1025211533. The next prime is 1025211563. The reversal of 1025211553 is 3551125201.

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 a de Polignac number, because none of the positive numbers 2^k-1025211553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025211533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8688175 + ... + 8688292.

It is an arithmetic number, because the mean of its divisors is an integer number (260647020).

Almost surely, 2^1025211553 is an apocalyptic number.

It is an amenable number.

1025211553 is a deficient number, since it is larger than the sum of its proper divisors (17376527).

1025211553 is an equidigital number, since it uses as much as digits as its factorization.

1025211553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17376526.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1025211553 is about 32018.9249194910. The cubic root of 1025211553 is about 1008.3341991629.

Adding to 1025211553 its reverse (3551125201), we get a palindrome (4576336754).

It can be divided in two parts, 10252115 and 53, that multiplied together give a triangular number (543362095 = T₃₂₉₆₅).

The spelling of 1025211553 in words is "one billion, twenty-five million, two hundred eleven thousand, five hundred fifty-three".