1220523253 has 4 divisors (see below), whose sum is σ = 1220693760. Its totient is φ = 1220352748.

The previous prime is 1220523251. The next prime is 1220523257. The reversal of 1220523253 is 3523250221.

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 not a de Polignac number, because 1220523253 - 2¹ = 1220523251 is a prime.

It is a super-2 number, since 2×1220523253² = 2979354022227404018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220523251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74023 + ... + 88996.

It is an arithmetic number, because the mean of its divisors is an integer number (305173440).

Almost surely, 2^1220523253 is an apocalyptic number.

It is an amenable number.

1220523253 is a deficient number, since it is larger than the sum of its proper divisors (170507).

1220523253 is an equidigital number, since it uses as much as digits as its factorization.

1220523253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170506.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1220523253 is about 34935.9879350792. The cubic root of 1220523253 is about 1068.6824709883.

Adding to 1220523253 its reverse (3523250221), we get a palindrome (4743773474).

The spelling of 1220523253 in words is "one billion, two hundred twenty million, five hundred twenty-three thousand, two hundred fifty-three".