61013155 has 8 divisors (see below), whose sum is σ = 83675232. Its totient is φ = 41837568.

The previous prime is 61013143. The next prime is 61013159. The reversal of 61013155 is 55131016.

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

It is a cyclic number.

It is not a de Polignac number, because 61013155 - 2¹³ = 61004963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61013159) 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, 871582 + ... + 871651.

It is an arithmetic number, because the mean of its divisors is an integer number (10459404).

Almost surely, 2^61013155 is an apocalyptic number.

61013155 is a deficient number, since it is larger than the sum of its proper divisors (22662077).

61013155 is a wasteful number, since it uses less digits than its factorization.

61013155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743245.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 61013155 is about 7811.0917930850. The cubic root of 61013155 is about 393.6780138831.

The spelling of 61013155 in words is "sixty-one million, thirteen thousand, one hundred fifty-five".