631325040420 has 192 divisors, whose sum is σ = 1852364505600. Its totient is φ = 160447795200.

The previous prime is 631325040403. The next prime is 631325040427. The reversal of 631325040420 is 24040523136.

It is a super-2 number, since 2×631325040420² (a number of 24 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (631325040427) 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, 100191270 + ... + 100197570.

It is an arithmetic number, because the mean of its divisors is an integer number (9647731800).

Almost surely, 2^631325040420 is an apocalyptic number.

631325040420 is a gapful number since it is divisible by the number (60) 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 631325040420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926182252800).

631325040420 is an abundant number, since it is smaller than the sum of its proper divisors (1221039465180).

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

631325040420 is a wasteful number, since it uses less digits than its factorization.

631325040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7078 (or 7076 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 631325040420 its reverse (24040523136), we get a palindrome (655365563556).

The spelling of 631325040420 in words is "six hundred thirty-one billion, three hundred twenty-five million, forty thousand, four hundred twenty".