1631212372 has 24 divisors (see below), whose sum is σ = 2867646600. Its totient is φ = 811894656.

The previous prime is 1631212369. The next prime is 1631212379. The reversal of 1631212372 is 2732121361.

It can be written as a sum of positive squares in 4 ways, for example, as 159415876 + 1471796496 = 12626^2 + 38364^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1631212372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631212379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1326654 + ... + 1327882.

It is an arithmetic number, because the mean of its divisors is an integer number (119485275).

Almost surely, 2^1631212372 is an apocalyptic number.

It is an amenable number.

1631212372 is a deficient number, since it is larger than the sum of its proper divisors (1236434228).

1631212372 is a wasteful number, since it uses less digits than its factorization.

1631212372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2473 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 1631212372 is about 40388.2702278768. The cubic root of 1631212372 is about 1177.1636300724.

The spelling of 1631212372 in words is "one billion, six hundred thirty-one million, two hundred twelve thousand, three hundred seventy-two".