155057851 has 4 divisors (see below), whose sum is σ = 166985392. Its totient is φ = 143130312.

The previous prime is 155057849. The next prime is 155057869. The reversal of 155057851 is 158750551.

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

It is not a de Polignac number, because 155057851 - 2¹ = 155057849 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 155057851.

It is not an unprimeable number, because it can be changed into a prime (155057831) 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, 5963751 + ... + 5963776.

It is an arithmetic number, because the mean of its divisors is an integer number (41746348).

Almost surely, 2^155057851 is an apocalyptic number.

155057851 is a deficient number, since it is larger than the sum of its proper divisors (11927541).

155057851 is a wasteful number, since it uses less digits than its factorization.

155057851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11927540.

The product of its (nonzero) digits is 35000, while the sum is 37.

The square root of 155057851 is about 12452.2227333115. Note that the first 3 decimals coincide. The cubic root of 155057851 is about 537.2353567237.

The spelling of 155057851 in words is "one hundred fifty-five million, fifty-seven thousand, eight hundred fifty-one".