31250378125 has 12 divisors (see below), whose sum is σ = 39060476532. Its totient is φ = 25000300000.

The previous prime is 31250378119. The next prime is 31250378149. The reversal of 31250378125 is 52187305213.

It can be written as a sum of positive squares in 6 ways, for example, as 26211933801 + 5038444324 = 161901^2 + 70982^2 .

It is not a de Polignac number, because 31250378125 - 2¹⁷ = 31250247053 is a prime.

It is a super-2 number, since 2×31250378125² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4996936 + ... + 5003185.

It is an arithmetic number, because the mean of its divisors is an integer number (3255039711).

Almost surely, 2^31250378125 is an apocalyptic number.

It is an amenable number.

31250378125 is a deficient number, since it is larger than the sum of its proper divisors (7810098407).

31250378125 is an frugal number, since it uses more digits than its factorization.

31250378125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000146 (or 10000126 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 31250378125 in words is "thirty-one billion, two hundred fifty million, three hundred seventy-eight thousand, one hundred twenty-five".