61275533 has 4 divisors (see below), whose sum is σ = 66846048. Its totient is φ = 55705020.

The previous prime is 61275523. The next prime is 61275553. The reversal of 61275533 is 33557216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61275533 - 2⁴ = 61275517 is a prime.

It is a super-3 number, since 3×61275533³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61275533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61275503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785241 + ... + 2785262.

It is an arithmetic number, because the mean of its divisors is an integer number (16711512).

Almost surely, 2^61275533 is an apocalyptic number.

It is an amenable number.

61275533 is a deficient number, since it is larger than the sum of its proper divisors (5570515).

61275533 is a wasteful number, since it uses less digits than its factorization.

61275533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570514.

The product of its digits is 18900, while the sum is 32.

The square root of 61275533 is about 7827.8689948159. The cubic root of 61275533 is about 394.2415248071.

The spelling of 61275533 in words is "sixty-one million, two hundred seventy-five thousand, five hundred thirty-three".