31541200000 has 96 divisors (see below), whose sum is σ = 78540949620. Its totient is φ = 12616320000.

The previous prime is 31541199961. The next prime is 31541200003. The reversal of 31541200000 is 214513.

It can be written as a sum of positive squares in 6 ways, for example, as 11370383424 + 20170816576 = 106632^2 + 142024^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (31541200003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360574 + ... + 439426.

Almost surely, 2^31541200000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31541200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39270474810).

31541200000 is an abundant number, since it is smaller than the sum of its proper divisors (46999749620).

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

31541200000 is an frugal number, since it uses more digits than its factorization.

31541200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78892 (or 78860 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 31541200000 its reverse (214513), we get a palindrome (31541414513).

The spelling of 31541200000 in words is "thirty-one billion, five hundred forty-one million, two hundred thousand".