2135523400 has 48 divisors (see below), whose sum is σ = 4970150640. Its totient is φ = 853339200.

The previous prime is 2135523371. The next prime is 2135523409. The reversal of 2135523400 is 43255312.

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 (2135523409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213307 + ... + 223093.

It is an arithmetic number, because the mean of its divisors is an integer number (103544805).

Almost surely, 2^2135523400 is an apocalyptic number.

2135523400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2135523400 is an abundant number, since it is smaller than the sum of its proper divisors (2834627240).

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

2135523400 is a wasteful number, since it uses less digits than its factorization.

2135523400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10894 (or 10885 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2135523400 is about 46211.7236207437. The cubic root of 2135523400 is about 1287.7595467571.

Adding to 2135523400 its reverse (43255312), we get a palindrome (2178778712).

The spelling of 2135523400 in words is "two billion, one hundred thirty-five million, five hundred twenty-three thousand, four hundred".