2142787531 has 2 divisors, whose sum is σ = 2142787532. Its totient is φ = 2142787530.

The previous prime is 2142787523. The next prime is 2142787607. The reversal of 2142787531 is 1357872412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2142787531 - 2³ = 2142787523 is a prime.

It is a super-2 number, since 2×2142787531² = 9183076806018151922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2142787631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071393765 + 1071393766.

It is an arithmetic number, because the mean of its divisors is an integer number (1071393766).

Almost surely, 2^2142787531 is an apocalyptic number.

2142787531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142787531 is an equidigital number, since it uses as much as digits as its factorization.

2142787531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The square root of 2142787531 is about 46290.2530885283. The cubic root of 2142787531 is about 1289.2180287752.

The spelling of 2142787531 in words is "two billion, one hundred forty-two million, seven hundred eighty-seven thousand, five hundred thirty-one".