31381278150 has 24 divisors (see below), whose sum is σ = 77825570184. Its totient is φ = 8368340800.

The previous prime is 31381278127. The next prime is 31381278157. The reversal of 31381278150 is 5187218313.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 31381278099 and 31381278108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31381278157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104604111 + ... + 104604410.

It is an arithmetic number, because the mean of its divisors is an integer number (3242732091).

Almost surely, 2^31381278150 is an apocalyptic number.

31381278150 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31381278150 is an abundant number, since it is smaller than the sum of its proper divisors (46444292034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31381278150 is a wasteful number, since it uses less digits than its factorization.

31381278150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209208536 (or 209208531 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 31381278150 in words is "thirty-one billion, three hundred eighty-one million, two hundred seventy-eight thousand, one hundred fifty".