30550156 has 48 divisors (see below), whose sum is σ = 69685056. Its totient is φ = 11372544.

The previous prime is 30550153. The next prime is 30550171. The reversal of 30550156 is 65105503.

30550156 = T₃₈₃ + T₃₈₄ + ... + T₆₂₀.

It is a self number, because there is not a number n which added to its sum of digits gives 30550156.

It is not an unprimeable number, because it can be changed into a prime (30550151) 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, 3720 + ... + 8656.

It is an arithmetic number, because the mean of its divisors is an integer number (1451772).

Almost surely, 2^30550156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30550156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34842528).

30550156 is an abundant number, since it is smaller than the sum of its proper divisors (39134900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30550156 is a wasteful number, since it uses less digits than its factorization.

30550156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978 (or 4976 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 30550156 is about 5527.2195541701. The cubic root of 30550156 is about 312.6111596013.

Adding to 30550156 its reverse (65105503), we get a palindrome (95655659).

The spelling of 30550156 in words is "thirty million, five hundred fifty thousand, one hundred fifty-six".