631103550 has 192 divisors, whose sum is σ = 1974302208. Its totient is φ = 129600000.

The previous prime is 631103533. The next prime is 631103573. The reversal of 631103550 is 55301136.

It is a self number, because there is not a number n which added to its sum of digits gives 631103550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1166280 + ... + 1166820.

It is an arithmetic number, because the mean of its divisors is an integer number (10282824).

Almost surely, 2^631103550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631103550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987151104).

631103550 is an abundant number, since it is smaller than the sum of its proper divisors (1343198658).

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

631103550 is a wasteful number, since it uses less digits than its factorization.

631103550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 631103550 is about 25121.7744198136. The cubic root of 631103550 is about 857.7621419438.

Adding to 631103550 its reverse (55301136), we get a palindrome (686404686).

The spelling of 631103550 in words is "six hundred thirty-one million, one hundred three thousand, five hundred fifty".