135210819 has 8 divisors (see below), whose sum is σ = 182750992. Its totient is φ = 88905600.

The previous prime is 135210811. The next prime is 135210851. The reversal of 135210819 is 918012531.

135210819 = T₅₄₇₇ + T₅₄₇₈ + ... + T₅₄₈₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135210819 - 2³ = 135210811 is a prime.

It is a super-2 number, since 2×135210819² = 36563931149301522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135210811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308482 + ... + 308919.

It is an arithmetic number, because the mean of its divisors is an integer number (22843874).

Almost surely, 2^135210819 is an apocalyptic number.

135210819 is a deficient number, since it is larger than the sum of its proper divisors (47540173).

135210819 is an equidigital number, since it uses as much as digits as its factorization.

135210819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617477.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 135210819 is about 11628.0187048353. The cubic root of 135210819 is about 513.2596787654.

The spelling of 135210819 in words is "one hundred thirty-five million, two hundred ten thousand, eight hundred nineteen".