61222631 has 2 divisors, whose sum is σ = 61222632. Its totient is φ = 61222630.

The previous prime is 61222607. The next prime is 61222649. The reversal of 61222631 is 13622216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61222631 - 2²² = 57028327 is a prime.

It is a super-2 number, since 2×61222631² = 7496421093124322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61222597 and 61222606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61222331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30611315 + 30611316.

It is an arithmetic number, because the mean of its divisors is an integer number (30611316).

Almost surely, 2^61222631 is an apocalyptic number.

61222631 is a deficient number, since it is larger than the sum of its proper divisors (1).

61222631 is an equidigital number, since it uses as much as digits as its factorization.

61222631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 61222631 is about 7824.4891846050. The cubic root of 61222631 is about 394.1280364970.

Adding to 61222631 its reverse (13622216), we get a palindrome (74844847).

The spelling of 61222631 in words is "sixty-one million, two hundred twenty-two thousand, six hundred thirty-one".