61501441 has 4 divisors (see below), whose sum is σ = 61546500. Its totient is φ = 61456384.

The previous prime is 61501417. The next prime is 61501457. The reversal of 61501441 is 14410516.

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 11587216 + 49914225 = 3404^2 + 7065^2 .

It is a cyclic number.

It is not a de Polignac number, because 61501441 - 2⁵ = 61501409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61501411) 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, 20416 + ... + 23233.

It is an arithmetic number, because the mean of its divisors is an integer number (15386625).

Almost surely, 2^61501441 is an apocalyptic number.

It is an amenable number.

61501441 is a deficient number, since it is larger than the sum of its proper divisors (45059).

61501441 is a wasteful number, since it uses less digits than its factorization.

61501441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45058.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 61501441 is about 7842.2854449452. The cubic root of 61501441 is about 394.7254215235.

Adding to 61501441 its reverse (14410516), we get a palindrome (75911957).

The spelling of 61501441 in words is "sixty-one million, five hundred one thousand, four hundred forty-one".