40161553 has 2 divisors, whose sum is σ = 40161554. Its totient is φ = 40161552.

The previous prime is 40161551. The next prime is 40161557. The reversal of 40161553 is 35516104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33443089 + 6718464 = 5783^2 + 2592^2 .

It is a cyclic number.

It is not a de Polignac number, because 40161553 - 2¹ = 40161551 is a prime.

It is a super-2 number, since 2×40161553² = 3225900678743618, which contains 22 as substring.

Together with 40161551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40161551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20080776 + 20080777.

It is an arithmetic number, because the mean of its divisors is an integer number (20080777).

Almost surely, 2^40161553 is an apocalyptic number.

It is an amenable number.

40161553 is a deficient number, since it is larger than the sum of its proper divisors (1).

40161553 is an equidigital number, since it uses as much as digits as its factorization.

40161553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 40161553 is about 6337.3143365309. The cubic root of 40161553 is about 342.4549904446.

Adding to 40161553 its reverse (35516104), we get a palindrome (75677657).

The spelling of 40161553 in words is "forty million, one hundred sixty-one thousand, five hundred fifty-three".