61535443 has 4 divisors (see below), whose sum is σ = 61629480. Its totient is φ = 61441408.

The previous prime is 61535431. The next prime is 61535447. The reversal of 61535443 is 34453516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61535443 is a prime.

It is a super-2 number, since 2×61535443² = 7573221490412498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61535447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46030 + ... + 47347.

It is an arithmetic number, because the mean of its divisors is an integer number (15407370).

Almost surely, 2^61535443 is an apocalyptic number.

61535443 is a deficient number, since it is larger than the sum of its proper divisors (94037).

61535443 is an equidigital number, since it uses as much as digits as its factorization.

61535443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94036.

The product of its digits is 21600, while the sum is 31.

The square root of 61535443 is about 7844.4530083365. The cubic root of 61535443 is about 394.7981514243.

Adding to 61535443 its reverse (34453516), we get a palindrome (95988959).

The spelling of 61535443 in words is "sixty-one million, five hundred thirty-five thousand, four hundred forty-three".