201542440 has 48 divisors (see below), whose sum is σ = 498454740. Its totient is φ = 73286400.

The previous prime is 201542401. The next prime is 201542477. The reversal of 201542440 is 44245102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 184253476 + 17288964 = 13574^2 + 4158^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15981 + ... + 25660.

Almost surely, 2^201542440 is an apocalyptic number.

201542440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201542440 is an abundant number, since it is smaller than the sum of its proper divisors (296912300).

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

201542440 is a wasteful number, since it uses less digits than its factorization.

201542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41674 (or 41659 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 201542440 is about 14196.5643731151. The cubic root of 201542440 is about 586.3030733165.

Adding to 201542440 its reverse (44245102), we get a palindrome (245787542).

The spelling of 201542440 in words is "two hundred one million, five hundred forty-two thousand, four hundred forty".