7631251220 has 12 divisors (see below), whose sum is σ = 16025627604. Its totient is φ = 3052500480.

The previous prime is 7631251217. The next prime is 7631251223. The reversal of 7631251220 is 221521367.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7631251217) and next prime (7631251223).

It can be written as a sum of positive squares in 2 ways, for example, as 5114824324 + 2516426896 = 71518^2 + 50164^2 .

It is a super-3 number, since 3×7631251220³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7631251223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190781261 + ... + 190781300.

It is an arithmetic number, because the mean of its divisors is an integer number (1335468967).

Almost surely, 2^7631251220 is an apocalyptic number.

It is an amenable number.

7631251220 is an abundant number, since it is smaller than the sum of its proper divisors (8394376384).

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

7631251220 is a wasteful number, since it uses less digits than its factorization.

7631251220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381562570 (or 381562568 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 7631251220 is about 87357.0330311189. The cubic root of 7631251220 is about 1968.7863224406.

Adding to 7631251220 its reverse (221521367), we get a palindrome (7852772587).

The spelling of 7631251220 in words is "seven billion, six hundred thirty-one million, two hundred fifty-one thousand, two hundred twenty".