840051131 has 4 divisors (see below), whose sum is σ = 840120264. Its totient is φ = 839982000.

The previous prime is 840051127. The next prime is 840051133. The reversal of 840051131 is 131150048.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 840051131 - 2² = 840051127 is a prime.

It is a super-2 number, since 2×840051131² = 1411371805388758322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840051097 and 840051106.

It is not an unprimeable number, because it can be changed into a prime (840051133) 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, 10970 + ... + 42431.

It is an arithmetic number, because the mean of its divisors is an integer number (210030066).

Almost surely, 2^840051131 is an apocalyptic number.

840051131 is a deficient number, since it is larger than the sum of its proper divisors (69133).

840051131 is a wasteful number, since it uses less digits than its factorization.

840051131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69132.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 840051131 is about 28983.6355725088. The cubic root of 840051131 is about 943.5579401519.

The spelling of 840051131 in words is "eight hundred forty million, fifty-one thousand, one hundred thirty-one".