61225332531 has 32 divisors (see below), whose sum is σ = 89891942400. Its totient is φ = 36759031200.

The previous prime is 61225332521. The next prime is 61225332541. The reversal of 61225332531 is 13523352216.

It is an interprime number because it is at equal distance from previous prime (61225332521) and next prime (61225332541).

It is not a de Polignac number, because 61225332531 - 2¹⁰ = 61225331507 is a prime.

It is a super-2 number, since 2×61225332531² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 61225332492 and 61225332501.

It is not an unprimeable number, because it can be changed into a prime (61225332521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1654570 + ... + 1691168.

It is an arithmetic number, because the mean of its divisors is an integer number (2809123200).

Almost surely, 2^61225332531 is an apocalyptic number.

61225332531 is a deficient number, since it is larger than the sum of its proper divisors (28666609869).

61225332531 is a wasteful number, since it uses less digits than its factorization.

61225332531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37087.

The product of its digits is 32400, while the sum is 33.

Adding to 61225332531 its reverse (13523352216), we get a palindrome (74748684747).

The spelling of 61225332531 in words is "sixty-one billion, two hundred twenty-five million, three hundred thirty-two thousand, five hundred thirty-one".