30551145 has 16 divisors (see below), whose sum is σ = 51455040. Its totient is φ = 15436224.

The previous prime is 30551141. The next prime is 30551149. The reversal of 30551145 is 54115503.

It is an interprime number because it is at equal distance from previous prime (30551141) and next prime (30551149).

It is not a de Polignac number, because 30551145 - 2² = 30551141 is a prime.

It is a super-3 number, since 3×30551145³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30551141) 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, 53314 + ... + 53883.

It is an arithmetic number, because the mean of its divisors is an integer number (3215940).

Almost surely, 2^30551145 is an apocalyptic number.

It is an amenable number.

30551145 is a deficient number, since it is larger than the sum of its proper divisors (20903895).

30551145 is a wasteful number, since it uses less digits than its factorization.

30551145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107224.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 30551145 is about 5527.3090197672. The cubic root of 30551145 is about 312.6145329513.

Adding to 30551145 its reverse (54115503), we get a palindrome (84666648).

The spelling of 30551145 in words is "thirty million, five hundred fifty-one thousand, one hundred forty-five".