30961541 has 4 divisors (see below), whose sum is σ = 33343212. Its totient is φ = 28579872.

The previous prime is 30961517. The next prime is 30961549. The reversal of 30961541 is 14516903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13912900 + 17048641 = 3730^2 + 4129^2 .

It is a cyclic number.

It is not a de Polignac number, because 30961541 - 2¹⁴ = 30945157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30961549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190816 + ... + 1190841.

It is an arithmetic number, because the mean of its divisors is an integer number (8335803).

Almost surely, 2^30961541 is an apocalyptic number.

It is an amenable number.

30961541 is a deficient number, since it is larger than the sum of its proper divisors (2381671).

30961541 is a wasteful number, since it uses less digits than its factorization.

30961541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381670.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 30961541 is about 5564.3095708273. The cubic root of 30961541 is about 314.0081035679.

The spelling of 30961541 in words is "thirty million, nine hundred sixty-one thousand, five hundred forty-one".