61172355 has 16 divisors (see below), whose sum is σ = 98426880. Its totient is φ = 32441568.

The previous prime is 61172351. The next prime is 61172357. The reversal of 61172355 is 55327116.

61172355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61172355 - 2² = 61172351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61172351) 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 15 ways as a sum of consecutive naturals, for example, 8707 + ... + 14076.

It is an arithmetic number, because the mean of its divisors is an integer number (6151680).

Almost surely, 2^61172355 is an apocalyptic number.

61172355 is a deficient number, since it is larger than the sum of its proper divisors (37254525).

61172355 is a wasteful number, since it uses less digits than its factorization.

61172355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22970.

The product of its digits is 6300, while the sum is 30.

The square root of 61172355 is about 7821.2757910714. The cubic root of 61172355 is about 394.0201210232.

The spelling of 61172355 in words is "sixty-one million, one hundred seventy-two thousand, three hundred fifty-five".