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30230055021 = 310076685007
BaseRepresentation
bin11100001001110110…
…100000100001101101
32220000210011220112110
4130021312200201231
5443402343230041
621515410554233
72120062141125
oct341166404155
986023156473
1030230055021
1111903094851
125a37b98979
132b09c4342a
14166ac11c85
15bbde1d516
hex709da086d

30230055021 has 4 divisors (see below), whose sum is σ = 40306740032. Its totient is φ = 20153370012.

The previous prime is 30230055019. The next prime is 30230055029. The reversal of 30230055021 is 12055003203.

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 30230055021 - 21 = 30230055019 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 (30230055029) 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, 5038342501 + ... + 5038342506.

It is an arithmetic number, because the mean of its divisors is an integer number (10076685008).

Almost surely, 230230055021 is an apocalyptic number.

It is an amenable number.

30230055021 is a deficient number, since it is larger than the sum of its proper divisors (10076685011).

30230055021 is a wasteful number, since it uses less digits than its factorization.

30230055021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10076685010.

The product of its (nonzero) digits is 900, while the sum is 21.

Adding to 30230055021 its reverse (12055003203), we get a palindrome (42285058224).

The spelling of 30230055021 in words is "thirty billion, two hundred thirty million, fifty-five thousand, twenty-one".

Divisors: 1 3 10076685007 30230055021