61140533 has 4 divisors (see below), whose sum is σ = 61478508. Its totient is φ = 60802560.

The previous prime is 61140523. The next prime is 61140623. The reversal of 61140533 is 33504116.

It is a happy number.

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 22972849 + 38167684 = 4793^2 + 6178^2 .

It is a cyclic number.

It is not a de Polignac number, because 61140533 - 2¹⁴ = 61124149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61140499 and 61140508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61140523) 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, 168716 + ... + 169077.

It is an arithmetic number, because the mean of its divisors is an integer number (15369627).

Almost surely, 2^61140533 is an apocalyptic number.

It is an amenable number.

61140533 is a deficient number, since it is larger than the sum of its proper divisors (337975).

61140533 is a wasteful number, since it uses less digits than its factorization.

61140533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337974.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 61140533 is about 7819.2412035951. The cubic root of 61140533 is about 393.9517857808.

Adding to 61140533 its reverse (33504116), we get a palindrome (94644649).

The spelling of 61140533 in words is "sixty-one million, one hundred forty thousand, five hundred thirty-three".