67142631 has 4 divisors (see below), whose sum is σ = 89523512. Its totient is φ = 44761752.

The previous prime is 67142623. The next prime is 67142633. The reversal of 67142631 is 13624176.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 67142631 - 2³ = 67142623 is a prime.

It is a super-2 number, since 2×67142631² = 9016265795204322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67142633) 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, 11190436 + ... + 11190441.

It is an arithmetic number, because the mean of its divisors is an integer number (22380878).

Almost surely, 2^67142631 is an apocalyptic number.

67142631 is a deficient number, since it is larger than the sum of its proper divisors (22380881).

67142631 is a wasteful number, since it uses less digits than its factorization.

67142631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22380880.

The product of its digits is 6048, while the sum is 30.

The square root of 67142631 is about 8194.0607149325. The cubic root of 67142631 is about 406.4428160522.

The spelling of 67142631 in words is "sixty-seven million, one hundred forty-two thousand, six hundred thirty-one".