7213733 has 4 divisors (see below), whose sum is σ = 7242060. Its totient is φ = 7185408.

The previous prime is 7213709. The next prime is 7213747. The reversal of 7213733 is 3373127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3373127 = 19 ⋅177533.

It can be written as a sum of positive squares in 2 ways, for example, as 4464769 + 2748964 = 2113^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 7213733 - 2⁸ = 7213477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7213033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13778 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (1810515).

Almost surely, 2^7213733 is an apocalyptic number.

It is an amenable number.

7213733 is a deficient number, since it is larger than the sum of its proper divisors (28327).

7213733 is a wasteful number, since it uses less digits than its factorization.

7213733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28326.

The product of its digits is 2646, while the sum is 26.

The square root of 7213733 is about 2685.8393473922. The cubic root of 7213733 is about 193.2205680757.

Subtracting from 7213733 its reverse (3373127), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 7213733 in words is "seven million, two hundred thirteen thousand, seven hundred thirty-three".