40051631 has 2 divisors, whose sum is σ = 40051632. Its totient is φ = 40051630.

The previous prime is 40051577. The next prime is 40051633. The reversal of 40051631 is 13615004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40051631 - 2¹⁰ = 40050607 is a prime.

It is a super-2 number, since 2×40051631² = 3208266291520322, which contains 22 as substring.

Together with 40051633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40051633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20025815 + 20025816.

It is an arithmetic number, because the mean of its divisors is an integer number (20025816).

Almost surely, 2^40051631 is an apocalyptic number.

40051631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40051631 is an equidigital number, since it uses as much as digits as its factorization.

40051631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 40051631 is about 6328.6357929652. The cubic root of 40051631 is about 342.1422723500.

Adding to 40051631 its reverse (13615004), we get a palindrome (53666635).

The spelling of 40051631 in words is "forty million, fifty-one thousand, six hundred thirty-one".