155540051 has 8 divisors (see below), whose sum is σ = 161395584. Its totient is φ = 149736960.

The previous prime is 155540039. The next prime is 155540059. The reversal of 155540051 is 150045551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155540051 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 155540051.

It is not an unprimeable number, because it can be changed into a prime (155540059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7016 + ... + 18981.

It is an arithmetic number, because the mean of its divisors is an integer number (20174448).

Almost surely, 2^155540051 is an apocalyptic number.

155540051 is a deficient number, since it is larger than the sum of its proper divisors (5855533).

155540051 is a wasteful number, since it uses less digits than its factorization.

155540051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26221.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 155540051 is about 12471.5697087416. The cubic root of 155540051 is about 537.7916798711.

The spelling of 155540051 in words is "one hundred fifty-five million, five hundred forty thousand, fifty-one".