63561121 has 8 divisors (see below), whose sum is σ = 71426880. Its totient is φ = 56120592.

The previous prime is 63561107. The next prime is 63561131. The reversal of 63561121 is 12116536.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63561121 - 2⁷ = 63560993 is a prime.

It is a super-2 number, since 2×63561121² = 8080032205553282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63561131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105991 + ... + 106588.

It is an arithmetic number, because the mean of its divisors is an integer number (8928360).

Almost surely, 2^63561121 is an apocalyptic number.

It is an amenable number.

63561121 is a deficient number, since it is larger than the sum of its proper divisors (7865759).

63561121 is a wasteful number, since it uses less digits than its factorization.

63561121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212615.

The product of its digits is 1080, while the sum is 25.

The square root of 63561121 is about 7972.5228754767. The cubic root of 63561121 is about 399.0835707470.

Adding to 63561121 its reverse (12116536), we get a palindrome (75677657).

The spelling of 63561121 in words is "sixty-three million, five hundred sixty-one thousand, one hundred twenty-one".