61115501 has 4 divisors (see below), whose sum is σ = 61144512. Its totient is φ = 61086492.

The previous prime is 61115497. The next prime is 61115503. The reversal of 61115501 is 10551116.

61115501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61115501 - 2² = 61115497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61115503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11075 + ... + 15648.

It is an arithmetic number, because the mean of its divisors is an integer number (15286128).

Almost surely, 2^61115501 is an apocalyptic number.

It is an amenable number.

61115501 is a deficient number, since it is larger than the sum of its proper divisors (29011).

61115501 is a wasteful number, since it uses less digits than its factorization.

61115501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29010.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 61115501 is about 7817.6403729003. The cubic root of 61115501 is about 393.8980148658.

Adding to 61115501 its reverse (10551116), we get a palindrome (71666617).

It can be divided in two parts, 61115 and 501, that added together give a palindrome (61616).

The spelling of 61115501 in words is "sixty-one million, one hundred fifteen thousand, five hundred one".