53143340 has 36 divisors (see below), whose sum is σ = 116687424. Its totient is φ = 20329056.

The previous prime is 53143333. The next prime is 53143367. The reversal of 53143340 is 4334135.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 8069 + ... + 13091.

Almost surely, 2^53143340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53143340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58343712).

53143340 is an abundant number, since it is smaller than the sum of its proper divisors (63544084).

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

53143340 is a wasteful number, since it uses less digits than its factorization.

53143340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078 (or 5053 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 53143340 is about 7289.9478736134. The cubic root of 53143340 is about 375.9669033038.

Adding to 53143340 its reverse (4334135), we get a palindrome (57477475).

The spelling of 53143340 in words is "fifty-three million, one hundred forty-three thousand, three hundred forty".