38942531 has 4 divisors (see below), whose sum is σ = 39114312. Its totient is φ = 38770752.

The previous prime is 38942489. The next prime is 38942557. The reversal of 38942531 is 13524983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13524983 = 59 ⋅229237.

It is a cyclic number.

It is not a de Polignac number, because 38942531 - 2¹⁸ = 38680387 is a prime.

It is a super-2 number, since 2×38942531² = 3033041441371922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38942491 and 38942500.

It is not an unprimeable number, because it can be changed into a prime (38942581) 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, 85550 + ... + 86003.

It is an arithmetic number, because the mean of its divisors is an integer number (9778578).

Almost surely, 2^38942531 is an apocalyptic number.

38942531 is a deficient number, since it is larger than the sum of its proper divisors (171781).

38942531 is a wasteful number, since it uses less digits than its factorization.

38942531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171780.

The product of its digits is 25920, while the sum is 35.

The square root of 38942531 is about 6240.3950996712. The cubic root of 38942531 is about 338.9544901679.

The spelling of 38942531 in words is "thirty-eight million, nine hundred forty-two thousand, five hundred thirty-one".