30642115 has 32 divisors (see below), whose sum is σ = 43476480. Its totient is φ = 20300544.

The previous prime is 30642113. The next prime is 30642119. The reversal of 30642115 is 51124603.

It is a cyclic number.

It is not a de Polignac number, because 30642115 - 2¹ = 30642113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30642113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171096 + ... + 171274.

It is an arithmetic number, because the mean of its divisors is an integer number (1358640).

Almost surely, 2^30642115 is an apocalyptic number.

30642115 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30642115 is a deficient number, since it is larger than the sum of its proper divisors (12834365).

30642115 is a wasteful number, since it uses less digits than its factorization.

30642115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30642115 is about 5535.5320430831. The cubic root of 30642115 is about 312.9245089405.

Adding to 30642115 its reverse (51124603), we get a palindrome (81766718).

The spelling of 30642115 in words is "thirty million, six hundred forty-two thousand, one hundred fifteen".