154545522251 has 4 divisors (see below), whose sum is σ = 154563403632. Its totient is φ = 154527640872.

The previous prime is 154545522239. The next prime is 154545522253. The reversal of 154545522251 is 152225545451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 154545522251 - 2²² = 154541327947 is a prime.

It is a super-2 number, since 2×154545522251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154545522199 and 154545522208.

It is not an unprimeable number, because it can be changed into a prime (154545522253) 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, 8927720 + ... + 8945013.

It is an arithmetic number, because the mean of its divisors is an integer number (38640850908).

Almost surely, 2^154545522251 is an apocalyptic number.

154545522251 is a deficient number, since it is larger than the sum of its proper divisors (17881381).

154545522251 is an equidigital number, since it uses as much as digits as its factorization.

154545522251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17881380.

The product of its digits is 400000, while the sum is 41.

The spelling of 154545522251 in words is "one hundred fifty-four billion, five hundred forty-five million, five hundred twenty-two thousand, two hundred fifty-one".