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30101 = 31971

30101 has 4 divisors (see below), whose sum is σ = 31104. Its totient is φ = 29100.

The previous prime is 30097. The next prime is 30103. The reversal of 30101 is 10103.

Adding to 30101 its reverse (10103), we get a palindrome (40204).

It can be divided in two parts, 30 and 101, that added together give a palindrome (131).

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 a cyclic number.

It is not a de Polignac number, because 30101 - 22 = 30097 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

30101 is a modest number, since divided by 101 gives 3 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30103) 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, 455 + ... + 516.

It is an arithmetic number, because the mean of its divisors is an integer number (7776).

230101 is an apocalyptic number.

30101 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30101 is a deficient number, since it is larger than the sum of its proper divisors (1003).

30101 is an equidigital number, since it uses as much as digits as its factorization.

30101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002.

The product of its (nonzero) digits is 3, while the sum is 5.

The square root of 30101 is about 173.4963976571. The cubic root of 30101 is about 31.1071560543.

The spelling of 30101 in words is "thirty thousand, one hundred one".

Divisors: 1 31 971 30101