155442051 has 16 divisors (see below), whose sum is σ = 230630400. Its totient is φ = 103472424.

The previous prime is 155442047. The next prime is 155442061. The reversal of 155442051 is 150244551.

155442051 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 155442051 - 2² = 155442047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (155442011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15670 + ... + 23588.

It is an arithmetic number, because the mean of its divisors is an integer number (14414400).

Almost surely, 2^155442051 is an apocalyptic number.

155442051 is a deficient number, since it is larger than the sum of its proper divisors (75188349).

155442051 is an equidigital number, since it uses as much as digits as its factorization.

155442051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8655 (or 8649 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 155442051 is about 12467.6401536137. The cubic root of 155442051 is about 537.6787086310.

The spelling of 155442051 in words is "one hundred fifty-five million, four hundred forty-two thousand, fifty-one".