249909220941 has 4 divisors (see below), whose sum is σ = 333212294592. Its totient is φ = 166606147292.

The previous prime is 249909220871. The next prime is 249909220961. The reversal of 249909220941 is 149022909942.

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 249909220941 - 2¹⁴ = 249909204557 is a prime.

It is a super-2 number, since 2×249909220941² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249909220961) 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, 41651536821 + ... + 41651536826.

It is an arithmetic number, because the mean of its divisors is an integer number (83303073648).

Almost surely, 2^249909220941 is an apocalyptic number.

It is an amenable number.

249909220941 is a deficient number, since it is larger than the sum of its proper divisors (83303073651).

249909220941 is an equidigital number, since it uses as much as digits as its factorization.

249909220941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83303073650.

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 249909220941 in words is "two hundred forty-nine billion, nine hundred nine million, two hundred twenty thousand, nine hundred forty-one".