61022251 has 4 divisors (see below), whose sum is σ = 61461400. Its totient is φ = 60583104.

The previous prime is 61022237. The next prime is 61022261. The reversal of 61022251 is 15222016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61022251 - 2⁷ = 61022123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61022201) 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 3 ways as a sum of consecutive naturals, for example, 219366 + ... + 219643.

It is an arithmetic number, because the mean of its divisors is an integer number (15365350).

Almost surely, 2^61022251 is an apocalyptic number.

61022251 is a deficient number, since it is larger than the sum of its proper divisors (439149).

61022251 is a wasteful number, since it uses less digits than its factorization.

61022251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439148.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 61022251 is about 7811.6740203365. The cubic root of 61022251 is about 393.6975764254.

Adding to 61022251 its reverse (15222016), we get a palindrome (76244267).

The spelling of 61022251 in words is "sixty-one million, twenty-two thousand, two hundred fifty-one".