30081137 has 4 divisors (see below), whose sum is σ = 30310896. Its totient is φ = 29851380.

The previous prime is 30081131. The next prime is 30081179. The reversal of 30081137 is 73118003.

It is a happy number.

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 30081137 - 2²⁰ = 29032561 is a prime.

It is a super-3 number, since 3×30081137³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30081131) 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, 114683 + ... + 114944.

It is an arithmetic number, because the mean of its divisors is an integer number (7577724).

Almost surely, 2^30081137 is an apocalyptic number.

It is an amenable number.

30081137 is a deficient number, since it is larger than the sum of its proper divisors (229759).

30081137 is a wasteful number, since it uses less digits than its factorization.

30081137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229758.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 30081137 is about 5484.6273346509. The cubic root of 30081137 is about 311.0031223516.

The spelling of 30081137 in words is "thirty million, eighty-one thousand, one hundred thirty-seven".