67157213 has 4 divisors (see below), whose sum is σ = 67559520. Its totient is φ = 66754908.

The previous prime is 67157203. The next prime is 67157231. The reversal of 67157213 is 31275176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67157213 - 2⁴ = 67157197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67157213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67157203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200903 + ... + 201236.

It is an arithmetic number, because the mean of its divisors is an integer number (16889880).

Almost surely, 2^67157213 is an apocalyptic number.

It is an amenable number.

67157213 is a deficient number, since it is larger than the sum of its proper divisors (402307).

67157213 is a wasteful number, since it uses less digits than its factorization.

67157213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402306.

The product of its digits is 8820, while the sum is 32.

The square root of 67157213 is about 8194.9504574463. The cubic root of 67157213 is about 406.4722375988.

It can be divided in two parts, 6 and 7157213, that multiplied together give a triangular number (42943278 = T₉₂₆₇).

The spelling of 67157213 in words is "sixty-seven million, one hundred fifty-seven thousand, two hundred thirteen".