31202072130 has 32 divisors (see below), whose sum is σ = 74891314368. Its totient is φ = 8319848000.

The previous prime is 31202072129. The next prime is 31202072171. The reversal of 31202072130 is 3127020213.

It is a junction number, because it is equal to n+sod(n) for n = 31202072097 and 31202072106.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 384520 + ... + 458540.

It is an arithmetic number, because the mean of its divisors is an integer number (2340353574).

Almost surely, 2^31202072130 is an apocalyptic number.

31202072130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31202072130 is an abundant number, since it is smaller than the sum of its proper divisors (43689242238).

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

31202072130 is a wasteful number, since it uses less digits than its factorization.

31202072130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88082.

The product of its (nonzero) digits is 504, while the sum is 21.

Adding to 31202072130 its reverse (3127020213), we get a palindrome (34329092343).

The spelling of 31202072130 in words is "thirty-one billion, two hundred two million, seventy-two thousand, one hundred thirty".