61047225831 has 16 divisors (see below), whose sum is σ = 81798319328. Its totient is φ = 40497408000.

The previous prime is 61047225829. The next prime is 61047225859. The reversal of 61047225831 is 13852274016.

It is not a de Polignac number, because 61047225831 - 2¹ = 61047225829 is a prime.

It is a super-2 number, since 2×61047225831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61047225831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61047225931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905181 + ... + 970281.

It is an arithmetic number, because the mean of its divisors is an integer number (5112394958).

Almost surely, 2^61047225831 is an apocalyptic number.

61047225831 is a deficient number, since it is larger than the sum of its proper divisors (20751093497).

61047225831 is a wasteful number, since it uses less digits than its factorization.

61047225831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66642.

The product of its (nonzero) digits is 80640, while the sum is 39.

Adding to 61047225831 its reverse (13852274016), we get a palindrome (74899499847).

The spelling of 61047225831 in words is "sixty-one billion, forty-seven million, two hundred twenty-five thousand, eight hundred thirty-one".