1631129052 has 72 divisors (see below), whose sum is σ = 4432890000. Its totient is φ = 465454080.

The previous prime is 1631129051. The next prime is 1631129063. The reversal of 1631129052 is 2509211361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631129051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 733302 + ... + 735522.

Almost surely, 2^1631129052 is an apocalyptic number.

1631129052 is a gapful number since it is divisible by the number (12) 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 1631129052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2216445000).

1631129052 is an abundant number, since it is smaller than the sum of its proper divisors (2801760948).

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

1631129052 is a wasteful number, since it uses less digits than its factorization.

1631129052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491 (or 3482 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1631129052 is about 40387.2387271029. The cubic root of 1631129052 is about 1177.1435871184.

The spelling of 1631129052 in words is "one billion, six hundred thirty-one million, one hundred twenty-nine thousand, fifty-two".