1220152553 has 4 divisors (see below), whose sum is σ = 1273202688. Its totient is φ = 1167102420.

The previous prime is 1220152547. The next prime is 1220152567. The reversal of 1220152553 is 3552510221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3552510221 = 13 ⋅273270017.

It is a cyclic number.

It is not a de Polignac number, because 1220152553 - 2⁶ = 1220152489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220158553) 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, 26525033 + ... + 26525078.

It is an arithmetic number, because the mean of its divisors is an integer number (318300672).

Almost surely, 2^1220152553 is an apocalyptic number.

It is an amenable number.

1220152553 is a deficient number, since it is larger than the sum of its proper divisors (53050135).

1220152553 is an equidigital number, since it uses as much as digits as its factorization.

1220152553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53050134.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1220152553 is about 34930.6821147254. The cubic root of 1220152553 is about 1068.5742658380.

Adding to 1220152553 its reverse (3552510221), we get a palindrome (4772662774).

The spelling of 1220152553 in words is "one billion, two hundred twenty million, one hundred fifty-two thousand, five hundred fifty-three".