31430520000 has 420 divisors, whose sum is σ = 122826039336. Its totient is φ = 7618560000.

The previous prime is 31430519999. The next prime is 31430520001. The reversal of 31430520000 is 2503413.

31430520000 is a `hidden beast` number, since 3 + 143 + 0 + 520 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (31430519999) and next prime (31430520001).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31430520001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3956032 + ... + 3963968.

Almost surely, 2^31430520000 is an apocalyptic number.

31430520000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31430520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61413019668).

31430520000 is an abundant number, since it is smaller than the sum of its proper divisors (91395519336).

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

31430520000 is a wasteful number, since it uses less digits than its factorization.

31430520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986 (or 7958 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The spelling of 31430520000 in words is "thirty-one billion, four hundred thirty million, five hundred twenty thousand".