61551241 has 4 divisors (see below), whose sum is σ = 64790800. Its totient is φ = 58311684.

The previous prime is 61551233. The next prime is 61551263. The reversal of 61551241 is 14215516.

It is a happy number.

61551241 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61551241 - 2³ = 61551233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61551221) 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, 1619751 + ... + 1619788.

It is an arithmetic number, because the mean of its divisors is an integer number (16197700).

Almost surely, 2^61551241 is an apocalyptic number.

It is an amenable number.

61551241 is a deficient number, since it is larger than the sum of its proper divisors (3239559).

61551241 is a wasteful number, since it uses less digits than its factorization.

61551241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239558.

The product of its digits is 1200, while the sum is 25.

The square root of 61551241 is about 7845.4598972909. The cubic root of 61551241 is about 394.8319340555.

Adding to 61551241 its reverse (14215516), we get a palindrome (75766757).

It can be divided in two parts, 6155 and 1241, that added together give a square (7396 = 86²).

The spelling of 61551241 in words is "sixty-one million, five hundred fifty-one thousand, two hundred forty-one".