38151961 has 4 divisors (see below), whose sum is σ = 40396212. Its totient is φ = 35907712.

The previous prime is 38151947. The next prime is 38151973. The reversal of 38151961 is 16915183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16915183 = 293 ⋅57731.

It can be written as a sum of positive squares in 2 ways, for example, as 32718400 + 5433561 = 5720^2 + 2331^2 .

It is a cyclic number.

It is not a de Polignac number, because 38151961 - 2⁷ = 38151833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38151941) 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, 1122100 + ... + 1122133.

It is an arithmetic number, because the mean of its divisors is an integer number (10099053).

Almost surely, 2^38151961 is an apocalyptic number.

It is an amenable number.

38151961 is a deficient number, since it is larger than the sum of its proper divisors (2244251).

38151961 is a wasteful number, since it uses less digits than its factorization.

38151961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244250.

The product of its digits is 6480, while the sum is 34.

The square root of 38151961 is about 6176.7273697323. The cubic root of 38151961 is about 336.6450929983.

It can be divided in two parts, 3815 and 1961, that added together give a square (5776 = 76²).

The spelling of 38151961 in words is "thirty-eight million, one hundred fifty-one thousand, nine hundred sixty-one".