31103509248 has 576 divisors, whose sum is σ = 110199398400. Its totient is φ = 8466923520.

The previous prime is 31103509243. The next prime is 31103509267. The reversal of 31103509248 is 84290530113.

31103509248 is a `hidden beast` number, since 3 + 1 + 103 + 509 + 2 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31103509243) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133491340 + ... + 133491572.

It is an arithmetic number, because the mean of its divisors is an integer number (191318400).

Almost surely, 2^31103509248 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 31103509248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55099699200).

31103509248 is an abundant number, since it is smaller than the sum of its proper divisors (79095889152).

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

31103509248 is a wasteful number, since it uses less digits than its factorization.

31103509248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 31103509248 in words is "thirty-one billion, one hundred three million, five hundred nine thousand, two hundred forty-eight".