40751621 has 2 divisors, whose sum is σ = 40751622. Its totient is φ = 40751620.

The previous prime is 40751591. The next prime is 40751693. The reversal of 40751621 is 12615704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33189121 + 7562500 = 5761^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 40751621 - 2¹⁴ = 40735237 is a prime.

It is a super-2 number, since 2×40751621² = 3321389228255282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40750621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20375810 + 20375811.

It is an arithmetic number, because the mean of its divisors is an integer number (20375811).

Almost surely, 2^40751621 is an apocalyptic number.

It is an amenable number.

40751621 is a deficient number, since it is larger than the sum of its proper divisors (1).

40751621 is an equidigital number, since it uses as much as digits as its factorization.

40751621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 40751621 is about 6383.6996326582. The cubic root of 40751621 is about 344.1240003886.

The spelling of 40751621 in words is "forty million, seven hundred fifty-one thousand, six hundred twenty-one".