61511152331 has 2 divisors, whose sum is σ = 61511152332. Its totient is φ = 61511152330.

The previous prime is 61511152291. The next prime is 61511152337. The reversal of 61511152331 is 13325111516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61511152331 - 2⁶ = 61511152267 is a prime.

It is a super-2 number, since 2×61511152331² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61511152294 and 61511152303.

It is not a weakly prime, because it can be changed into another prime (61511152337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30755576165 + 30755576166.

It is an arithmetic number, because the mean of its divisors is an integer number (30755576166).

Almost surely, 2^61511152331 is an apocalyptic number.

61511152331 is a deficient number, since it is larger than the sum of its proper divisors (1).

61511152331 is an equidigital number, since it uses as much as digits as its factorization.

61511152331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 29.

Adding to 61511152331 its reverse (13325111516), we get a palindrome (74836263847).

The spelling of 61511152331 in words is "sixty-one billion, five hundred eleven million, one hundred fifty-two thousand, three hundred thirty-one".