134213531 has 2 divisors, whose sum is σ = 134213532. Its totient is φ = 134213530.

The previous prime is 134213507. The next prime is 134213567. The reversal of 134213531 is 135312431.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134213531 is a prime.

It is a super-2 number, since 2×134213531² = 36026543806975922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_7603322 and since 134213531 and 7603322 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 134213497 and 134213506.

It is not a weakly prime, because it can be changed into another prime (134213581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67106765 + 67106766.

It is an arithmetic number, because the mean of its divisors is an integer number (67106766).

Almost surely, 2^134213531 is an apocalyptic number.

134213531 is a deficient number, since it is larger than the sum of its proper divisors (1).

134213531 is an equidigital number, since it uses as much as digits as its factorization.

134213531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 134213531 is about 11585.0563658534. The cubic root of 134213531 is about 511.9946631829.

Adding to 134213531 its reverse (135312431), we get a palindrome (269525962).

The spelling of 134213531 in words is "one hundred thirty-four million, two hundred thirteen thousand, five hundred thirty-one".