30551146 has 4 divisors (see below), whose sum is σ = 45826722. Its totient is φ = 15275572.

The previous prime is 30551141. The next prime is 30551149. The reversal of 30551146 is 64115503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64115503 = 157 ⋅408379.

It can be written as a sum of positive squares in only one way, i.e., 27678121 + 2873025 = 5261^2 + 1695^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30551146.

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 as a sum of consecutive naturals, namely, 7637785 + ... + 7637788.

Almost surely, 2^30551146 is an apocalyptic number.

30551146 is a deficient number, since it is larger than the sum of its proper divisors (15275576).

30551146 is a wasteful number, since it uses less digits than its factorization.

30551146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15275575.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 30551146 is about 5527.3091102271. The cubic root of 30551146 is about 312.6145363621.

Adding to 30551146 its reverse (64115503), we get a palindrome (94666649).

The spelling of 30551146 in words is "thirty million, five hundred fifty-one thousand, one hundred forty-six".