215133437429 has 2 divisors, whose sum is σ = 215133437430. Its totient is φ = 215133437428.

The previous prime is 215133437381. The next prime is 215133437447. The reversal of 215133437429 is 924734331512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199081054225 + 16052383204 = 446185^2 + 126698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215133437429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215133437429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215133437489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107566718714 + 107566718715.

It is an arithmetic number, because the mean of its divisors is an integer number (107566718715).

Almost surely, 2^215133437429 is an apocalyptic number.

It is an amenable number.

215133437429 is a deficient number, since it is larger than the sum of its proper divisors (1).

215133437429 is an equidigital number, since it uses as much as digits as its factorization.

215133437429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 44.

The spelling of 215133437429 in words is "two hundred fifteen billion, one hundred thirty-three million, four hundred thirty-seven thousand, four hundred twenty-nine".