61512273 has 24 divisors (see below), whose sum is σ = 94435848. Its totient is φ = 38449152.

The previous prime is 61512251. The next prime is 61512289. The reversal of 61512273 is 37221516.

It is a happy number.

61512273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10575504 + 50936769 = 3252^2 + 7137^2 .

It is not a de Polignac number, because 61512273 - 2⁹ = 61511761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61512203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50965 + ... + 52157.

It is an arithmetic number, because the mean of its divisors is an integer number (3934827).

Almost surely, 2^61512273 is an apocalyptic number.

It is an amenable number.

61512273 is a deficient number, since it is larger than the sum of its proper divisors (32923575).

61512273 is a wasteful number, since it uses less digits than its factorization.

61512273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1550 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 61512273 is about 7842.9760295439. The cubic root of 61512273 is about 394.7485939603.

Adding to 61512273 its reverse (37221516), we get a palindrome (98733789).

The spelling of 61512273 in words is "sixty-one million, five hundred twelve thousand, two hundred seventy-three".