216257948 has 6 divisors (see below), whose sum is σ = 378451416. Its totient is φ = 108128972.

The previous prime is 216257947. The next prime is 216257957. The reversal of 216257948 is 849752612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216257899 and 216257908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216257947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27032240 + ... + 27032247.

It is an arithmetic number, because the mean of its divisors is an integer number (63075236).

Almost surely, 2^216257948 is an apocalyptic number.

It is an amenable number.

216257948 is a deficient number, since it is larger than the sum of its proper divisors (162193468).

216257948 is a wasteful number, since it uses less digits than its factorization.

216257948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54064491 (or 54064489 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 216257948 is about 14705.7114074770. The cubic root of 216257948 is about 600.2387457289.

The spelling of 216257948 in words is "two hundred sixteen million, two hundred fifty-seven thousand, nine hundred forty-eight".