154452202421 has 4 divisors (see below), whose sum is σ = 168493311744. Its totient is φ = 140411093100.

The previous prime is 154452202397. The next prime is 154452202423. The reversal of 154452202421 is 124202254451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 154452202421 - 2¹⁸ = 154451940277 is a prime.

It is a super-2 number, since 2×154452202421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154452202423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7020554645 + ... + 7020554666.

It is an arithmetic number, because the mean of its divisors is an integer number (42123327936).

Almost surely, 2^154452202421 is an apocalyptic number.

154452202421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

154452202421 is a deficient number, since it is larger than the sum of its proper divisors (14041109323).

154452202421 is a wasteful number, since it uses less digits than its factorization.

154452202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14041109322.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 154452202421 its reverse (124202254451), we get a palindrome (278654456872).

The spelling of 154452202421 in words is "one hundred fifty-four billion, four hundred fifty-two million, two hundred two thousand, four hundred twenty-one".