249226520285 has 4 divisors (see below), whose sum is σ = 299071824348. Its totient is φ = 199381216224.

The previous prime is 249226520273. The next prime is 249226520303. The reversal of 249226520285 is 582025622942.

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 163974783844 + 85251736441 = 404938^2 + 291979^2 .

It is a cyclic number.

It is not a de Polignac number, because 249226520285 - 2⁴ = 249226520269 is a prime.

It is a super-2 number, since 2×249226520285² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24922652024 + ... + 24922652033.

It is an arithmetic number, because the mean of its divisors is an integer number (74767956087).

Almost surely, 2^249226520285 is an apocalyptic number.

It is an amenable number.

249226520285 is a deficient number, since it is larger than the sum of its proper divisors (49845304063).

249226520285 is an equidigital number, since it uses as much as digits as its factorization.

249226520285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49845304062.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 249226520285 in words is "two hundred forty-nine billion, two hundred twenty-six million, five hundred twenty thousand, two hundred eighty-five".