31531145030 has 128 divisors (see below), whose sum is σ = 71778631680. Its totient is φ = 9687600000.

The previous prime is 31531145017. The next prime is 31531145053. The reversal of 31531145030 is 3054113513.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16160555 + ... + 16162505.

It is an arithmetic number, because the mean of its divisors is an integer number (560770560).

Almost surely, 2^31531145030 is an apocalyptic number.

31531145030 is an abundant number, since it is smaller than the sum of its proper divisors (40247486650).

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

31531145030 is a wasteful number, since it uses less digits than its factorization.

31531145030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 31531145030 its reverse (3054113513), we get a palindrome (34585258543).

The spelling of 31531145030 in words is "thirty-one billion, five hundred thirty-one million, one hundred forty-five thousand, thirty".