30281145 has 16 divisors (see below), whose sum is σ = 49133952. Its totient is φ = 15921920.

The previous prime is 30281143. The next prime is 30281149. The reversal of 30281145 is 54118203.

It is not a de Polignac number, because 30281145 - 2¹ = 30281143 is a prime.

It is a super-2 number, since 2×30281145² = 1833895485022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30281143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13152 + ... + 15281.

It is an arithmetic number, because the mean of its divisors is an integer number (3070872).

Almost surely, 2^30281145 is an apocalyptic number.

It is an amenable number.

30281145 is a deficient number, since it is larger than the sum of its proper divisors (18852807).

30281145 is a wasteful number, since it uses less digits than its factorization.

30281145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28512.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 30281145 is about 5502.8306352277. The cubic root of 30281145 is about 311.6908817901.

Adding to 30281145 its reverse (54118203), we get a palindrome (84399348).

The spelling of 30281145 in words is "thirty million, two hundred eighty-one thousand, one hundred forty-five".