155953491 has 4 divisors (see below), whose sum is σ = 207937992. Its totient is φ = 103968992.

The previous prime is 155953481. The next prime is 155953513. The reversal of 155953491 is 194359551.

155953491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 155953491 - 2⁵ = 155953459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155953481) 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, 25992246 + ... + 25992251.

It is an arithmetic number, because the mean of its divisors is an integer number (51984498).

Almost surely, 2^155953491 is an apocalyptic number.

155953491 is a deficient number, since it is larger than the sum of its proper divisors (51984501).

155953491 is an equidigital number, since it uses as much as digits as its factorization.

155953491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51984500.

The product of its digits is 121500, while the sum is 42.

The square root of 155953491 is about 12488.1340079293. The cubic root of 155953491 is about 538.2677584907.

The spelling of 155953491 in words is "one hundred fifty-five million, nine hundred fifty-three thousand, four hundred ninety-one".