61506113 has 4 divisors (see below), whose sum is σ = 61554480. Its totient is φ = 61457748.

The previous prime is 61506103. The next prime is 61506131. The reversal of 61506113 is 31160516.

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 61506113 - 2²⁴ = 44728897 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

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, 22223 + ... + 24836.

It is an arithmetic number, because the mean of its divisors is an integer number (15388620).

Almost surely, 2^61506113 is an apocalyptic number.

It is an amenable number.

61506113 is a deficient number, since it is larger than the sum of its proper divisors (48367).

61506113 is a wasteful number, since it uses less digits than its factorization.

61506113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48366.

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

The square root of 61506113 is about 7842.5833116391. The cubic root of 61506113 is about 394.7354164680.

Adding to 61506113 its reverse (31160516), we get a palindrome (92666629).

The spelling of 61506113 in words is "sixty-one million, five hundred six thousand, one hundred thirteen".