31300400125 has 8 divisors (see below), whose sum is σ = 39062899512. Its totient is φ = 25040320000.

The previous prime is 31300400123. The next prime is 31300400141. The reversal of 31300400125 is 52100400313.

It can be written as a sum of positive squares in 4 ways, for example, as 956850489 + 30343549636 = 30933^2 + 174194^2 .

It is not a de Polignac number, because 31300400125 - 2¹ = 31300400123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300400123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125201476 + ... + 125201725.

It is an arithmetic number, because the mean of its divisors is an integer number (4882862439).

Almost surely, 2^31300400125 is an apocalyptic number.

It is an amenable number.

31300400125 is a deficient number, since it is larger than the sum of its proper divisors (7762499387).

31300400125 is an equidigital number, since it uses as much as digits as its factorization.

31300400125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250403216 (or 250403206 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 31300400125 its reverse (52100400313), we get a palindrome (83400800438).

The spelling of 31300400125 in words is "thirty-one billion, three hundred million, four hundred thousand, one hundred twenty-five".