40240251 has 12 divisors (see below), whose sum is σ = 58183320. Its totient is φ = 26799840.

The previous prime is 40240247. The next prime is 40240259. The reversal of 40240251 is 15204204.

It is not a de Polignac number, because 40240251 - 2² = 40240247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40240259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11820 + ... + 14838.

It is an arithmetic number, because the mean of its divisors is an integer number (4848610).

Almost surely, 2^40240251 is an apocalyptic number.

40240251 is a deficient number, since it is larger than the sum of its proper divisors (17943069).

40240251 is a wasteful number, since it uses less digits than its factorization.

40240251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506 (or 4503 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40240251 is about 6343.5203948596. The cubic root of 40240251 is about 342.6785287664.

Adding to 40240251 its reverse (15204204), we get a palindrome (55444455).

It can be divided in two parts, 402402 and 51, that multiplied together give a palindrome (20522502).

The spelling of 40240251 in words is "forty million, two hundred forty thousand, two hundred fifty-one".