31405534100 has 36 divisors (see below), whose sum is σ = 68442549084. Its totient is φ = 12508289280.

The previous prime is 31405534099. The next prime is 31405534211. The reversal of 31405534100 is 143550413.

It can be written as a sum of positive squares in 6 ways, for example, as 4039110916 + 27366423184 = 63554^2 + 165428^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31405534100.

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, 650639 + ... + 697238.

It is an arithmetic number, because the mean of its divisors is an integer number (1901181919).

Almost surely, 2^31405534100 is an apocalyptic number.

It is an amenable number.

31405534100 is an abundant number, since it is smaller than the sum of its proper divisors (37037014984).

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

31405534100 is a wasteful number, since it uses less digits than its factorization.

31405534100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348124 (or 1348117 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 31405534100 in words is "thirty-one billion, four hundred five million, five hundred thirty-four thousand, one hundred".