61522081 has 8 divisors (see below), whose sum is σ = 62299328. Its totient is φ = 60750000.

The previous prime is 61522067. The next prime is 61522103. The reversal of 61522081 is 18022516.

61522081 = T₂₇₈ + T₂₇₉ + ... + T₇₃₀.

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

It is a 6-Lehmer number, since φ(61522081) divides (61522081-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 61522081 - 2⁵ = 61522049 is a prime.

It is a super-2 number, since 2×61522081² = 7569932901141122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61522001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26206 + ... + 28456.

It is an arithmetic number, because the mean of its divisors is an integer number (7787416).

Almost surely, 2^61522081 is an apocalyptic number.

It is an amenable number.

61522081 is a deficient number, since it is larger than the sum of its proper divisors (777247).

61522081 is a wasteful number, since it uses less digits than its factorization.

61522081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 61522081 is about 7843.6012774745. The cubic root of 61522081 is about 394.7695734509.

Adding to 61522081 its reverse (18022516), we get a palindrome (79544597).

The spelling of 61522081 in words is "sixty-one million, five hundred twenty-two thousand, eighty-one".