242161900 has 36 divisors (see below), whose sum is σ = 526169448. Its totient is φ = 96739840.

The previous prime is 242161873. The next prime is 242161903. The reversal of 242161900 is 9161242.

It is a super-2 number, since 2×242161900² = 117284771623220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (242161903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141852 + ... + 143548.

It is an arithmetic number, because the mean of its divisors is an integer number (14615818).

Almost surely, 2^242161900 is an apocalyptic number.

242161900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242161900 is an abundant number, since it is smaller than the sum of its proper divisors (284007548).

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

242161900 is a wasteful number, since it uses less digits than its factorization.

242161900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138 (or 3131 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 242161900 is about 15561.5519791568. The cubic root of 242161900 is about 623.3069056319.

The spelling of 242161900 in words is "two hundred forty-two million, one hundred sixty-one thousand, nine hundred".