61506101 has 4 divisors (see below), whose sum is σ = 61525632. Its totient is φ = 61486572.

The previous prime is 61506091. The next prime is 61506103. The reversal of 61506101 is 10160516.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61506101 - 2⁶ = 61506037 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 (61506103) 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, 3845 + ... + 11738.

It is an arithmetic number, because the mean of its divisors is an integer number (15381408).

Almost surely, 2^61506101 is an apocalyptic number.

It is an amenable number.

61506101 is a deficient number, since it is larger than the sum of its proper divisors (19531).

61506101 is a wasteful number, since it uses less digits than its factorization.

61506101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19530.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 61506101 is about 7842.5825465850. The cubic root of 61506101 is about 394.7353907967.

Adding to 61506101 its reverse (10160516), we get a palindrome (71666617).

The spelling of 61506101 in words is "sixty-one million, five hundred six thousand, one hundred one".