61522121 has 8 divisors (see below), whose sum is σ = 63312480. Its totient is φ = 59748192.

The previous prime is 61522103. The next prime is 61522127. The reversal of 61522121 is 12122516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61522121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61522093 and 61522102.

It is not an unprimeable number, because it can be changed into a prime (61522127) 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, 3701 + ... + 11693.

It is an arithmetic number, because the mean of its divisors is an integer number (7914060).

Almost surely, 2^61522121 is an apocalyptic number.

It is an amenable number.

61522121 is a deficient number, since it is larger than the sum of its proper divisors (1790359).

61522121 is a wasteful number, since it uses less digits than its factorization.

61522121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8215.

The product of its digits is 240, while the sum is 20.

The square root of 61522121 is about 7843.6038273233. The cubic root of 61522121 is about 394.7696590070.

Adding to 61522121 its reverse (12122516), we get a palindrome (73644637).

The spelling of 61522121 in words is "sixty-one million, five hundred twenty-two thousand, one hundred twenty-one".