1631040252 has 12 divisors (see below), whose sum is σ = 3805760616. Its totient is φ = 543680080.

The previous prime is 1631040251. The next prime is 1631040277. The reversal of 1631040252 is 2520401361.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631040251) 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, 67959999 + ... + 67960022.

It is an arithmetic number, because the mean of its divisors is an integer number (317146718).

Almost surely, 2^1631040252 is an apocalyptic number.

1631040252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1631040252 is an abundant number, since it is smaller than the sum of its proper divisors (2174720364).

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

1631040252 is a wasteful number, since it uses less digits than its factorization.

1631040252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135920028 (or 135920026 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1631040252 is about 40386.1393549817. The cubic root of 1631040252 is about 1177.1222251775.

The spelling of 1631040252 in words is "one billion, six hundred thirty-one million, forty thousand, two hundred fifty-two".