213745403 has 24 divisors (see below), whose sum is σ = 239690880. Its totient is φ = 189734400.

The previous prime is 213745397. The next prime is 213745409. The reversal of 213745403 is 304547312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213745397) and next prime (213745409).

It is a de Polignac number, because none of the positive numbers 2^k-213745403 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213745409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1960913 + ... + 1961021.

It is an arithmetic number, because the mean of its divisors is an integer number (9987120).

Almost surely, 2^213745403 is an apocalyptic number.

213745403 is a deficient number, since it is larger than the sum of its proper divisors (25945477).

213745403 is a wasteful number, since it uses less digits than its factorization.

213745403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 213745403 is about 14620.0343022853. The cubic root of 213745403 is about 597.9051043851.

The spelling of 213745403 in words is "two hundred thirteen million, seven hundred forty-five thousand, four hundred three".