361530021 has 4 divisors (see below), whose sum is σ = 482040032. Its totient is φ = 241020012.

The previous prime is 361530017. The next prime is 361530047. The reversal of 361530021 is 120035163.

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 not a de Polignac number, because 361530021 - 2² = 361530017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 361530021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361530061) 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, 60255001 + ... + 60255006.

It is an arithmetic number, because the mean of its divisors is an integer number (120510008).

Almost surely, 2^361530021 is an apocalyptic number.

It is an amenable number.

361530021 is a deficient number, since it is larger than the sum of its proper divisors (120510011).

361530021 is a wasteful number, since it uses less digits than its factorization.

361530021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120510010.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 361530021 is about 19013.9428052153. The cubic root of 361530021 is about 712.3850367916.

Adding to 361530021 its reverse (120035163), we get a palindrome (481565184).

The spelling of 361530021 in words is "three hundred sixty-one million, five hundred thirty thousand, twenty-one".