2131914402 has 18 divisors (see below), whose sum is σ = 4619572347. Its totient is φ = 710572836.

The previous prime is 2131914401. The next prime is 2131914431. The reversal of 2131914402 is 2044191312.

It is a happy number.

2131914402 is a `hidden beast` number, since 2 + 131 + 91 + 440 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1065957201 + 1065957201 = 32649^2 + 32649^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=32649.

It is not an unprimeable number, because it can be changed into a prime (2131914401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 190453 + ... + 201335.

Almost surely, 2^2131914402 is an apocalyptic number.

2131914402 is an abundant number, since it is smaller than the sum of its proper divisors (2487657945).

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

2131914402 is an frugal number, since it uses more digits than its factorization.

2131914402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21774 (or 10888 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2131914402 is about 46172.6585979192. The cubic root of 2131914402 is about 1287.0337071859.

It can be divided in two parts, 21319 and 14402, that added together give a square (35721 = 189²).

The spelling of 2131914402 in words is "two billion, one hundred thirty-one million, nine hundred fourteen thousand, four hundred two".