30361621 has 2 divisors, whose sum is σ = 30361622. Its totient is φ = 30361620.

The previous prime is 30361603. The next prime is 30361657. The reversal of 30361621 is 12616303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30360100 + 1521 = 5510^2 + 39^2 .

It is a cyclic number.

It is not a de Polignac number, because 30361621 - 2⁵ = 30361589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30361592 and 30361601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30361691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15180810 + 15180811.

It is an arithmetic number, because the mean of its divisors is an integer number (15180811).

Almost surely, 2^30361621 is an apocalyptic number.

It is an amenable number.

30361621 is a deficient number, since it is larger than the sum of its proper divisors (1).

30361621 is an equidigital number, since it uses as much as digits as its factorization.

30361621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 30361621 is about 5510.1380200500. The cubic root of 30361621 is about 311.9667569501.

Adding to 30361621 its reverse (12616303), we get a palindrome (42977924).

The spelling of 30361621 in words is "thirty million, three hundred sixty-one thousand, six hundred twenty-one".