61153285 has 4 divisors (see below), whose sum is σ = 73383948. Its totient is φ = 48922624.

The previous prime is 61153277. The next prime is 61153291. The reversal of 61153285 is 58235116.

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 41563809 + 19589476 = 6447^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 61153285 - 2³ = 61153277 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6115324 + ... + 6115333.

It is an arithmetic number, because the mean of its divisors is an integer number (18345987).

Almost surely, 2^61153285 is an apocalyptic number.

It is an amenable number.

61153285 is a deficient number, since it is larger than the sum of its proper divisors (12230663).

61153285 is a wasteful number, since it uses less digits than its factorization.

61153285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12230662.

The product of its digits is 7200, while the sum is 31.

The square root of 61153285 is about 7820.0565854730. The cubic root of 61153285 is about 393.9791725443.

The spelling of 61153285 in words is "sixty-one million, one hundred fifty-three thousand, two hundred eighty-five".