40152251 has 2 divisors, whose sum is σ = 40152252. Its totient is φ = 40152250.

The previous prime is 40152199. The next prime is 40152253. The reversal of 40152251 is 15225104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40152251 - 2¹⁴ = 40135867 is a prime.

It is a super-2 number, since 2×40152251² = 3224406520734002, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 40152253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40152253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20076125 + 20076126.

It is an arithmetic number, because the mean of its divisors is an integer number (20076126).

Almost surely, 2^40152251 is an apocalyptic number.

40152251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40152251 is an equidigital number, since it uses as much as digits as its factorization.

40152251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 40152251 is about 6336.5803869280. The cubic root of 40152251 is about 342.4285492170.

Adding to 40152251 its reverse (15225104), we get a palindrome (55377355).

The spelling of 40152251 in words is "forty million, one hundred fifty-two thousand, two hundred fifty-one".