235220473956 has 144 divisors (see below), whose sum is σ = 630475078464. Its totient is φ = 67988164608.

The previous prime is 235220473949. The next prime is 235220473979. The reversal of 235220473956 is 659374022532.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18852136 + ... + 18864608.

It is an arithmetic number, because the mean of its divisors is an integer number (4378299156).

Almost surely, 2^235220473956 is an apocalyptic number.

235220473956 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 235220473956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315237539232).

235220473956 is an abundant number, since it is smaller than the sum of its proper divisors (395254604508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

235220473956 is a wasteful number, since it uses less digits than its factorization.

235220473956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13070 (or 13055 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 48.

The spelling of 235220473956 in words is "two hundred thirty-five billion, two hundred twenty million, four hundred seventy-three thousand, nine hundred fifty-six".