40221667261 has 4 divisors (see below), whose sum is σ = 40224879900. Its totient is φ = 40218454624.

The previous prime is 40221667237. The next prime is 40221667267. The reversal of 40221667261 is 16276612204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31996265625 + 8225401636 = 178875^2 + 90694^2 .

It is a cyclic number.

It is not a de Polignac number, because 40221667261 - 2¹¹ = 40221665213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40221667261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221667267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1587466 + ... + 1612603.

It is an arithmetic number, because the mean of its divisors is an integer number (10056219975).

Almost surely, 2^40221667261 is an apocalyptic number.

It is an amenable number.

40221667261 is a deficient number, since it is larger than the sum of its proper divisors (3212639).

40221667261 is a wasteful number, since it uses less digits than its factorization.

40221667261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212638.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 40221667261 in words is "forty billion, two hundred twenty-one million, six hundred sixty-seven thousand, two hundred sixty-one".