1020215253 has 4 divisors (see below), whose sum is σ = 1360287008. Its totient is φ = 680143500.

The previous prime is 1020215249. The next prime is 1020215281. The reversal of 1020215253 is 3525120201.

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 not a de Polignac number, because 1020215253 - 2² = 1020215249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020215233) 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, 170035873 + ... + 170035878.

It is an arithmetic number, because the mean of its divisors is an integer number (340071752).

Almost surely, 2^1020215253 is an apocalyptic number.

It is an amenable number.

1020215253 is a deficient number, since it is larger than the sum of its proper divisors (340071755).

1020215253 is an equidigital number, since it uses as much as digits as its factorization.

1020215253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340071754.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1020215253 is about 31940.8085840043. The cubic root of 1020215253 is about 1006.6935145659.

Adding to 1020215253 its reverse (3525120201), we get a palindrome (4545335454).

The spelling of 1020215253 in words is "one billion, twenty million, two hundred fifteen thousand, two hundred fifty-three".