1011216553 has 4 divisors (see below), whose sum is σ = 1011723408. Its totient is φ = 1010709700.

The previous prime is 1011216527. The next prime is 1011216587. The reversal of 1011216553 is 3556121101.

It is a happy number.

1011216553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1011216553 - 2¹³ = 1011208361 is a prime.

It is a super-2 number, since 2×1011216553² = 2045117834122403618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011216953) 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, 250423 + ... + 254428.

It is an arithmetic number, because the mean of its divisors is an integer number (252930852).

Almost surely, 2^1011216553 is an apocalyptic number.

It is an amenable number.

1011216553 is a deficient number, since it is larger than the sum of its proper divisors (506855).

1011216553 is an equidigital number, since it uses as much as digits as its factorization.

1011216553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506854.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1011216553 is about 31799.6313343410. The cubic root of 1011216553 is about 1003.7249584562.

Adding to 1011216553 its reverse (3556121101), we get a palindrome (4567337654).

The spelling of 1011216553 in words is "one billion, eleven million, two hundred sixteen thousand, five hundred fifty-three".