61442533 has 4 divisors (see below), whose sum is σ = 63103180. Its totient is φ = 59781888.

The previous prime is 61442531. The next prime is 61442543. The reversal of 61442533 is 33524416.

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 33373729 + 28068804 = 5777^2 + 5298^2 .

It is a cyclic number.

It is not a de Polignac number, because 61442533 - 2¹ = 61442531 is a prime.

It is a super-2 number, since 2×61442533² = 7550369722912178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61442531) 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, 830268 + ... + 830341.

It is an arithmetic number, because the mean of its divisors is an integer number (15775795).

Almost surely, 2^61442533 is an apocalyptic number.

It is an amenable number.

61442533 is a deficient number, since it is larger than the sum of its proper divisors (1660647).

61442533 is a wasteful number, since it uses less digits than its factorization.

61442533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660646.

The product of its digits is 8640, while the sum is 28.

The square root of 61442533 is about 7838.5287522596. The cubic root of 61442533 is about 394.5993544878.

Adding to 61442533 its reverse (33524416), we get a palindrome (94966949).

The spelling of 61442533 in words is "sixty-one million, four hundred forty-two thousand, five hundred thirty-three".