40252251 has 12 divisors (see below), whose sum is σ = 58116408. Its totient is φ = 24770304.

The previous prime is 40252213. The next prime is 40252307. The reversal of 40252251 is 15225204.

It is a happy number.

It is not a de Polignac number, because 40252251 - 2⁷ = 40252123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40252211) 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, 39190 + ... + 40203.

It is an arithmetic number, because the mean of its divisors is an integer number (4843034).

Almost surely, 2^40252251 is an apocalyptic number.

40252251 is a deficient number, since it is larger than the sum of its proper divisors (17864157).

40252251 is a wasteful number, since it uses less digits than its factorization.

40252251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79422 (or 79409 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 40252251 is about 6344.4661713969. The cubic root of 40252251 is about 342.7125886405.

Adding to 40252251 its reverse (15225204), we get a palindrome (55477455).

The spelling of 40252251 in words is "forty million, two hundred fifty-two thousand, two hundred fifty-one".