245232661 has 4 divisors (see below), whose sum is σ = 253143424. Its totient is φ = 237321900.

The previous prime is 245232619. The next prime is 245232679. The reversal of 245232661 is 166232542.

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 245232661 - 2¹¹ = 245230613 is a prime.

It is a super-2 number, since 2×245232661² = 120278116042281842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 7910731 = 245232661 / (2 + 4 + 5 + 2 + 3 + 2 + 6 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245232461) 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, 3955335 + ... + 3955396.

It is an arithmetic number, because the mean of its divisors is an integer number (63285856).

Almost surely, 2^245232661 is an apocalyptic number.

It is an amenable number.

245232661 is a deficient number, since it is larger than the sum of its proper divisors (7910763).

245232661 is an equidigital number, since it uses as much as digits as its factorization.

245232661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7910762.

The product of its digits is 17280, while the sum is 31.

The square root of 245232661 is about 15659.9061619155. The cubic root of 245232661 is about 625.9304847496.

The spelling of 245232661 in words is "two hundred forty-five million, two hundred thirty-two thousand, six hundred sixty-one".