38722131 has 40 divisors (see below), whose sum is σ = 68271104. Its totient is φ = 21403440.

The previous prime is 38722127. The next prime is 38722139. The reversal of 38722131 is 13122783.

It is not a de Polignac number, because 38722131 - 2² = 38722127 is a prime.

It is a super-2 number, since 2×38722131² = 2998806858362322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38722095 and 38722104.

It is not an unprimeable number, because it can be changed into a prime (38722139) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16476 + ... + 18678.

Almost surely, 2^38722131 is an apocalyptic number.

38722131 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38722131 is a deficient number, since it is larger than the sum of its proper divisors (29548973).

38722131 is a wasteful number, since it uses less digits than its factorization.

38722131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253 (or 2244 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 38722131 is about 6222.7109044210. The cubic root of 38722131 is about 338.3138285946.

The spelling of 38722131 in words is "thirty-eight million, seven hundred twenty-two thousand, one hundred thirty-one".