61155713 has 4 divisors (see below), whose sum is σ = 61697028. Its totient is φ = 60614400.

The previous prime is 61155701. The next prime is 61155763. The reversal of 61155713 is 31755116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22118209 + 39037504 = 4703^2 + 6248^2 .

It is a cyclic number.

It is not a de Polignac number, because 61155713 - 2¹² = 61151617 is a prime.

It is a super-3 number, since 3×61155713³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61155763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270488 + ... + 270713.

It is an arithmetic number, because the mean of its divisors is an integer number (15424257).

Almost surely, 2^61155713 is an apocalyptic number.

It is an amenable number.

61155713 is a deficient number, since it is larger than the sum of its proper divisors (541315).

61155713 is a wasteful number, since it uses less digits than its factorization.

61155713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541314.

The product of its digits is 3150, while the sum is 29.

The square root of 61155713 is about 7820.2118257756. The cubic root of 61155713 is about 393.9843865939.

The spelling of 61155713 in words is "sixty-one million, one hundred fifty-five thousand, seven hundred thirteen".