40898251 has 2 divisors, whose sum is σ = 40898252. Its totient is φ = 40898250.

The previous prime is 40898239. The next prime is 40898261. The reversal of 40898251 is 15289804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40898251 is a prime.

It is equal to p_2484982 and since 40898251 and 2484982 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40898251.

It is not a weakly prime, because it can be changed into another prime (40898261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20449125 + 20449126.

It is an arithmetic number, because the mean of its divisors is an integer number (20449126).

Almost surely, 2^40898251 is an apocalyptic number.

40898251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40898251 is an equidigital number, since it uses as much as digits as its factorization.

40898251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 40898251 is about 6395.1740398522. The cubic root of 40898251 is about 344.5362416872.

The spelling of 40898251 in words is "forty million, eight hundred ninety-eight thousand, two hundred fifty-one".