1630288213 has 4 divisors (see below), whose sum is σ = 1630446028. Its totient is φ = 1630130400.

The previous prime is 1630288211. The next prime is 1630288243. The reversal of 1630288213 is 3128820361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3128820361 = 139 ⋅22509499.

It can be written as a sum of positive squares in 2 ways, for example, as 456335044 + 1173953169 = 21362^2 + 34263^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630288213 - 2¹ = 1630288211 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 (1630288211) 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, 62238 + ... + 84463.

It is an arithmetic number, because the mean of its divisors is an integer number (407611507).

Almost surely, 2^1630288213 is an apocalyptic number.

It is an amenable number.

1630288213 is a deficient number, since it is larger than the sum of its proper divisors (157815).

1630288213 is a wasteful number, since it uses less digits than its factorization.

1630288213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157814.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1630288213 is about 40376.8276738032. The cubic root of 1630288213 is about 1176.9412817764.

The spelling of 1630288213 in words is "one billion, six hundred thirty million, two hundred eighty-eight thousand, two hundred thirteen".