155343551 has 6 divisors (see below), whose sum is σ = 170749656. Its totient is φ = 141221300.

The previous prime is 155343533. The next prime is 155343553.

155343551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 155343551 - 2²⁶ = 88234687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155343553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 641795 + ... + 642036.

It is an arithmetic number, because the mean of its divisors is an integer number (28458276).

Almost surely, 2^155343551 is an apocalyptic number.

155343551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155343551 is a deficient number, since it is larger than the sum of its proper divisors (15406105).

155343551 is a wasteful number, since it uses less digits than its factorization.

155343551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283853 (or 1283842 counting only the distinct ones).

The product of its digits is 22500, while the sum is 32.

The square root of 155343551 is about 12463.6893013265. The cubic root of 155343551 is about 537.5651131502.

The spelling of 155343551 in words is "one hundred fifty-five million, three hundred forty-three thousand, five hundred fifty-one".