245531798 has 4 divisors (see below), whose sum is σ = 368297700. Its totient is φ = 122765898.

The previous prime is 245531773. The next prime is 245531843. The reversal of 245531798 is 897135542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 897135542 = 2 ⋅448567771.

It is a super-2 number, since 2×245531798² = 120571727658225608, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61382948 + ... + 61382951.

It is an arithmetic number, because the mean of its divisors is an integer number (92074425).

Almost surely, 2^245531798 is an apocalyptic number.

245531798 is a deficient number, since it is larger than the sum of its proper divisors (122765902).

245531798 is a wasteful number, since it uses less digits than its factorization.

245531798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122765901.

The product of its digits is 302400, while the sum is 44.

The square root of 245531798 is about 15669.4542980922. The cubic root of 245531798 is about 626.1848865440.

The spelling of 245531798 in words is "two hundred forty-five million, five hundred thirty-one thousand, seven hundred ninety-eight".