31241433630 has 128 divisors (see below), whose sum is σ = 86697547776. Its totient is φ = 7120742400.

The previous prime is 31241433607. The next prime is 31241433637. The reversal of 31241433630 is 3633414213.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31241433637) 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, 6802635 + ... + 6807225.

It is an arithmetic number, because the mean of its divisors is an integer number (677324592).

Almost surely, 2^31241433630 is an apocalyptic number.

31241433630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31241433630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43348773888).

31241433630 is an abundant number, since it is smaller than the sum of its proper divisors (55456114146).

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

31241433630 is a wasteful number, since it uses less digits than its factorization.

31241433630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5842.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 31241433630 its reverse (3633414213), we get a palindrome (34874847843).

The spelling of 31241433630 in words is "thirty-one billion, two hundred forty-one million, four hundred thirty-three thousand, six hundred thirty".