40038251 has 4 divisors (see below), whose sum is σ = 43678104. Its totient is φ = 36398400.

The previous prime is 40038233. The next prime is 40038269. The reversal of 40038251 is 15283004.

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

It is an interprime number because it is at equal distance from previous prime (40038233) and next prime (40038269).

It is a cyclic number.

It is not a de Polignac number, because 40038251 - 2¹⁴ = 40021867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40038221) 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, 1819910 + ... + 1819931.

It is an arithmetic number, because the mean of its divisors is an integer number (10919526).

Almost surely, 2^40038251 is an apocalyptic number.

40038251 is a deficient number, since it is larger than the sum of its proper divisors (3639853).

40038251 is a wasteful number, since it uses less digits than its factorization.

40038251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639852.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 40038251 is about 6327.5786048061. The cubic root of 40038251 is about 342.1041684213.

The spelling of 40038251 in words is "forty million, thirty-eight thousand, two hundred fifty-one".