61051481 has 4 divisors (see below), whose sum is σ = 61388964. Its totient is φ = 60714000.

The previous prime is 61051469. The next prime is 61051511. The reversal of 61051481 is 18415016.

61051481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10995856 + 50055625 = 3316^2 + 7075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61051481 is a prime.

It is a super-2 number, since 2×61051481² = 7454566664586722, which contains 22 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 61051481.

It is not an unprimeable number, because it can be changed into a prime (61051411) 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 3 ways as a sum of consecutive naturals, for example, 168470 + ... + 168831.

It is an arithmetic number, because the mean of its divisors is an integer number (15347241).

Almost surely, 2^61051481 is an apocalyptic number.

It is an amenable number.

61051481 is a deficient number, since it is larger than the sum of its proper divisors (337483).

61051481 is a wasteful number, since it uses less digits than its factorization.

61051481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337482.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 61051481 is about 7813.5447141486. The cubic root of 61051481 is about 393.7604275058.

Adding to 61051481 its reverse (18415016), we get a palindrome (79466497).

The spelling of 61051481 in words is "sixty-one million, fifty-one thousand, four hundred eighty-one".