1020551213 has 16 divisors (see below), whose sum is σ = 1148212800. Its totient is φ = 899011200.

The previous prime is 1020551201. The next prime is 1020551243. The reversal of 1020551213 is 3121550201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1020551213 - 2⁶ = 1020551149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020551243) 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, 59606 + ... + 74792.

It is an arithmetic number, because the mean of its divisors is an integer number (71763300).

Almost surely, 2^1020551213 is an apocalyptic number.

It is an amenable number.

1020551213 is a deficient number, since it is larger than the sum of its proper divisors (127661587).

1020551213 is a wasteful number, since it uses less digits than its factorization.

1020551213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15388.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1020551213 is about 31946.0672540455. The cubic root of 1020551213 is about 1006.8040048553.

The spelling of 1020551213 in words is "one billion, twenty million, five hundred fifty-one thousand, two hundred thirteen".