61143535 has 4 divisors (see below), whose sum is σ = 73372248. Its totient is φ = 48914824.

The previous prime is 61143517. The next prime is 61143541. The reversal of 61143535 is 53534116.

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

It is a cyclic number.

It is not a de Polignac number, because 61143535 - 2⁹ = 61143023 is a prime.

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, 6114349 + ... + 6114358.

It is an arithmetic number, because the mean of its divisors is an integer number (18343062).

Almost surely, 2^61143535 is an apocalyptic number.

61143535 is a deficient number, since it is larger than the sum of its proper divisors (12228713).

61143535 is a wasteful number, since it uses less digits than its factorization.

61143535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12228712.

The product of its digits is 5400, while the sum is 28.

The square root of 61143535 is about 7819.4331635995. The cubic root of 61143535 is about 393.9582333525.

The spelling of 61143535 in words is "sixty-one million, one hundred forty-three thousand, five hundred thirty-five".