155797851 has 16 divisors (see below), whose sum is σ = 228066048. Its totient is φ = 93818400.

The previous prime is 155797849. The next prime is 155797871. The reversal of 155797851 is 158797551.

It is a happy number.

It is not a de Polignac number, because 155797851 - 2¹ = 155797849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155797851.

It is not an unprimeable number, because it can be changed into a prime (155797871) 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 15 ways as a sum of consecutive naturals, for example, 9855 + ... + 20216.

It is an arithmetic number, because the mean of its divisors is an integer number (14254128).

Almost surely, 2^155797851 is an apocalyptic number.

155797851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155797851 is a deficient number, since it is larger than the sum of its proper divisors (72268197).

155797851 is a wasteful number, since it uses less digits than its factorization.

155797851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30242.

The product of its digits is 441000, while the sum is 48.

The square root of 155797851 is about 12481.9009369567. The cubic root of 155797851 is about 538.0886369717.

The spelling of 155797851 in words is "one hundred fifty-five million, seven hundred ninety-seven thousand, eight hundred fifty-one".