245631565 has 8 divisors (see below), whose sum is σ = 294979608. Its totient is φ = 196357440.

The previous prime is 245631553. The next prime is 245631577. The reversal of 245631565 is 565136542.

It is an interprime number because it is at equal distance from previous prime (245631553) and next prime (245631577).

It can be written as a sum of positive squares in 4 ways, for example, as 3175524 + 242456041 = 1782^2 + 15571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 245631565 - 2¹³ = 245623373 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 10882 + ... + 24691.

It is an arithmetic number, because the mean of its divisors is an integer number (36872451).

Almost surely, 2^245631565 is an apocalyptic number.

It is an amenable number.

245631565 is a deficient number, since it is larger than the sum of its proper divisors (49348043).

245631565 is a wasteful number, since it uses less digits than its factorization.

245631565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36959.

The product of its digits is 108000, while the sum is 37.

The square root of 245631565 is about 15672.6374615123. The cubic root of 245631565 is about 626.2696876824.

The spelling of 245631565 in words is "two hundred forty-five million, six hundred thirty-one thousand, five hundred sixty-five".