1320553211 has 16 divisors (see below), whose sum is σ = 1402334208. Its totient is φ = 1240932000.

The previous prime is 1320553189. The next prime is 1320553231. The reversal of 1320553211 is 1123550231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1320553211 - 2²⁶ = 1253444347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320553231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516386 + ... + 518936.

It is an arithmetic number, because the mean of its divisors is an integer number (87645888).

Almost surely, 2^1320553211 is an apocalyptic number.

1320553211 is a deficient number, since it is larger than the sum of its proper divisors (81780997).

1320553211 is a wasteful number, since it uses less digits than its factorization.

1320553211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1320553211 is about 36339.4167674717. The cubic root of 1320553211 is about 1097.1145343013.

The spelling of 1320553211 in words is "one billion, three hundred twenty million, five hundred fifty-three thousand, two hundred eleven".