2131978702 has 16 divisors (see below), whose sum is σ = 3753600480. Its totient is φ = 889010208.

The previous prime is 2131978663. The next prime is 2131978711. The reversal of 2131978702 is 2078791312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2057377 + ... + 2058412.

It is an arithmetic number, because the mean of its divisors is an integer number (234600030).

Almost surely, 2^2131978702 is an apocalyptic number.

2131978702 is a deficient number, since it is larger than the sum of its proper divisors (1621621778).

2131978702 is a wasteful number, since it uses less digits than its factorization.

2131978702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115835.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 2131978702 is about 46173.3548921886. The cubic root of 2131978702 is about 1287.0466463288.

The spelling of 2131978702 in words is "two billion, one hundred thirty-one million, nine hundred seventy-eight thousand, seven hundred two".