155971851 has 12 divisors (see below), whose sum is σ = 241915752. Its totient is φ = 89126688.

The previous prime is 155971843. The next prime is 155971861. The reversal of 155971851 is 158179551.

155971851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155971851 - 2³ = 155971843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155971801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 530370 + ... + 530663.

It is an arithmetic number, because the mean of its divisors is an integer number (20159646).

Almost surely, 2^155971851 is an apocalyptic number.

155971851 is a deficient number, since it is larger than the sum of its proper divisors (85943901).

155971851 is a wasteful number, since it uses less digits than its factorization.

155971851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061050 (or 1061043 counting only the distinct ones).

The product of its digits is 63000, while the sum is 42.

The square root of 155971851 is about 12488.8690841085. The cubic root of 155971851 is about 538.2888806175.

The spelling of 155971851 in words is "one hundred fifty-five million, nine hundred seventy-one thousand, eight hundred fifty-one".