154113551 has 4 divisors (see below), whose sum is σ = 163179072. Its totient is φ = 145048032.

The previous prime is 154113539. The next prime is 154113571. The reversal of 154113551 is 155311451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155311451 = 197 ⋅788383.

It is a cyclic number.

It is not a de Polignac number, because 154113551 - 2¹⁸ = 153851407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154113551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154113571) 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, 4532735 + ... + 4532768.

It is an arithmetic number, because the mean of its divisors is an integer number (40794768).

Almost surely, 2^154113551 is an apocalyptic number.

154113551 is a deficient number, since it is larger than the sum of its proper divisors (9065521).

154113551 is an equidigital number, since it uses as much as digits as its factorization.

154113551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9065520.

The product of its digits is 1500, while the sum is 26.

The square root of 154113551 is about 12414.2479031152. The cubic root of 154113551 is about 536.1425502172.

The spelling of 154113551 in words is "one hundred fifty-four million, one hundred thirteen thousand, five hundred fifty-one".