40299251 has 2 divisors, whose sum is σ = 40299252. Its totient is φ = 40299250.

The previous prime is 40299221. The next prime is 40299277. The reversal of 40299251 is 15299204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40299251 - 2¹⁰ = 40298227 is a prime.

It is a super-2 number, since 2×40299251² = 3248059262322002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40299211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20149625 + 20149626.

It is an arithmetic number, because the mean of its divisors is an integer number (20149626).

Almost surely, 2^40299251 is an apocalyptic number.

40299251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40299251 is an equidigital number, since it uses as much as digits as its factorization.

40299251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 40299251 is about 6348.1691061282. The cubic root of 40299251 is about 342.8459246743.

The spelling of 40299251 in words is "forty million, two hundred ninety-nine thousand, two hundred fifty-one".