61530161 has 8 divisors (see below), whose sum is σ = 76713024. Its totient is φ = 47945520.

The previous prime is 61530127. The next prime is 61530179. The reversal of 61530161 is 16103516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61530161 - 2²² = 57335857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61530121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399470 + ... + 399623.

It is an arithmetic number, because the mean of its divisors is an integer number (9589128).

Almost surely, 2^61530161 is an apocalyptic number.

It is an amenable number.

61530161 is a deficient number, since it is larger than the sum of its proper divisors (15182863).

61530161 is a wasteful number, since it uses less digits than its factorization.

61530161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799111.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 61530161 is about 7844.1163300910. The cubic root of 61530161 is about 394.7868550429.

Adding to 61530161 its reverse (16103516), we get a palindrome (77633677).

The spelling of 61530161 in words is "sixty-one million, five hundred thirty thousand, one hundred sixty-one".