252217042 has 16 divisors (see below), whose sum is σ = 471678912. Its totient is φ = 98266320.

The previous prime is 252217033. The next prime is 252217061. The reversal of 252217042 is 240712252.

It is a super-2 number, since 2×252217042² = 127226872550459528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 252216998 and 252217016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818733 + ... + 819040.

It is an arithmetic number, because the mean of its divisors is an integer number (29479932).

Almost surely, 2^252217042 is an apocalyptic number.

252217042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

252217042 is a deficient number, since it is larger than the sum of its proper divisors (219461870).

252217042 is a wasteful number, since it uses less digits than its factorization.

252217042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637793.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 252217042 is about 15881.3425754878. The cubic root of 252217042 is about 631.8172457350.

Adding to 252217042 its reverse (240712252), we get a palindrome (492929294).

The spelling of 252217042 in words is "two hundred fifty-two million, two hundred seventeen thousand, forty-two".