153212121540 has 96 divisors (see below), whose sum is σ = 476913870720. Its totient is φ = 40834800000.

The previous prime is 153212121539. The next prime is 153212121551. The reversal of 153212121540 is 45121212351.

It is a happy number.

153212121540 is a `hidden beast` number, since 1 + 532 + 1 + 2 + 121 + 5 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 951915 + ... + 1101165.

It is an arithmetic number, because the mean of its divisors is an integer number (4967852820).

Almost surely, 2^153212121540 is an apocalyptic number.

153212121540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153212121540 is an abundant number, since it is smaller than the sum of its proper divisors (323701749180).

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

153212121540 is a wasteful number, since it uses less digits than its factorization.

153212121540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151170 (or 151162 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 153212121540 its reverse (45121212351), we get a palindrome (198333333891).

The spelling of 153212121540 in words is "one hundred fifty-three billion, two hundred twelve million, one hundred twenty-one thousand, five hundred forty".