248195661 has 32 divisors (see below), whose sum is σ = 387866880. Its totient is φ = 138238464.

The previous prime is 248195657. The next prime is 248195669. The reversal of 248195661 is 166591842.

It is not a de Polignac number, because 248195661 - 2² = 248195657 is a prime.

It is a super-2 number, since 2×248195661² = 123202172278453842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248195669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191905 + ... + 193193.

It is an arithmetic number, because the mean of its divisors is an integer number (12120840).

Almost surely, 2^248195661 is an apocalyptic number.

248195661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

248195661 is a deficient number, since it is larger than the sum of its proper divisors (139671219).

248195661 is a wasteful number, since it uses less digits than its factorization.

248195661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525.

The product of its digits is 103680, while the sum is 42.

The square root of 248195661 is about 15754.2267661729. The cubic root of 248195661 is about 628.4413143783.

The spelling of 248195661 in words is "two hundred forty-eight million, one hundred ninety-five thousand, six hundred sixty-one".