133481357 has 2 divisors, whose sum is σ = 133481358. Its totient is φ = 133481356.

The previous prime is 133481339. The next prime is 133481371. The reversal of 133481357 is 753184331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131308681 + 2172676 = 11459^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 133481357 - 2¹⁴ = 133464973 is a prime.

It is a super-2 number, since 2×133481357² = 35634545333122898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133481317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66740678 + 66740679.

It is an arithmetic number, because the mean of its divisors is an integer number (66740679).

Almost surely, 2^133481357 is an apocalyptic number.

It is an amenable number.

133481357 is a deficient number, since it is larger than the sum of its proper divisors (1).

133481357 is an equidigital number, since it uses as much as digits as its factorization.

133481357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 133481357 is about 11553.4132186121. The cubic root of 133481357 is about 511.0619382312.

The spelling of 133481357 in words is "one hundred thirty-three million, four hundred eighty-one thousand, three hundred fifty-seven".