61250731 has 2 divisors, whose sum is σ = 61250732. Its totient is φ = 61250730.

The previous prime is 61250713. The next prime is 61250801. The reversal of 61250731 is 13705216.

Together with previous prime (61250713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61250731 - 2¹⁷ = 61119659 is a prime.

It is a super-2 number, since 2×61250731² = 7503304096068722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61250696 and 61250705.

It is not a weakly prime, because it can be changed into another prime (61250831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30625365 + 30625366.

It is an arithmetic number, because the mean of its divisors is an integer number (30625366).

Almost surely, 2^61250731 is an apocalyptic number.

61250731 is a deficient number, since it is larger than the sum of its proper divisors (1).

61250731 is an equidigital number, since it uses as much as digits as its factorization.

61250731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61250731 is about 7826.2846229868. The cubic root of 61250731 is about 394.1883263151.

Adding to 61250731 its reverse (13705216), we get a palindrome (74955947).

The spelling of 61250731 in words is "sixty-one million, two hundred fifty thousand, seven hundred thirty-one".