40251031 has 2 divisors, whose sum is σ = 40251032. Its totient is φ = 40251030.

The previous prime is 40251017. The next prime is 40251041. The reversal of 40251031 is 13015204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40251031 - 2²³ = 31862423 is a prime.

It is a super-2 number, since 2×40251031² = 3240290993125922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40250996 and 40251014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40251041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20125515 + 20125516.

It is an arithmetic number, because the mean of its divisors is an integer number (20125516).

Almost surely, 2^40251031 is an apocalyptic number.

40251031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40251031 is an equidigital number, since it uses as much as digits as its factorization.

40251031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 40251031 is about 6344.3700238873. The cubic root of 40251031 is about 342.7091261958.

Adding to 40251031 its reverse (13015204), we get a palindrome (53266235).

The spelling of 40251031 in words is "forty million, two hundred fifty-one thousand, thirty-one".