2401505581 has 4 divisors (see below), whose sum is σ = 2457354592. Its totient is φ = 2345656572.

The previous prime is 2401505543. The next prime is 2401505651. The reversal of 2401505581 is 1855051042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2401505581 - 2⁷ = 2401505453 is a prime.

It is a super-2 number, since 2×2401505581² = 11534458111148295122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2401905581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27924441 + ... + 27924526.

It is an arithmetic number, because the mean of its divisors is an integer number (614338648).

Almost surely, 2^2401505581 is an apocalyptic number.

It is an amenable number.

2401505581 is a deficient number, since it is larger than the sum of its proper divisors (55849011).

2401505581 is an equidigital number, since it uses as much as digits as its factorization.

2401505581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55849010.

The product of its (nonzero) digits is 8000, while the sum is 31.

The square root of 2401505581 is about 49005.1587182411. The cubic root of 2401505581 is about 1339.1458098439.

The spelling of 2401505581 in words is "two billion, four hundred one million, five hundred five thousand, five hundred eighty-one".