155474534 has 4 divisors (see below), whose sum is σ = 233211804. Its totient is φ = 77737266.

The previous prime is 155474533. The next prime is 155474551. The reversal of 155474534 is 435474551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 435474551 = 20173 ⋅21587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155474533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38868632 + ... + 38868635.

It is an arithmetic number, because the mean of its divisors is an integer number (58302951).

Almost surely, 2^155474534 is an apocalyptic number.

155474534 is a deficient number, since it is larger than the sum of its proper divisors (77737270).

155474534 is an equidigital number, since it uses as much as digits as its factorization.

155474534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77737269.

The product of its digits is 168000, while the sum is 38.

The square root of 155474534 is about 12468.9427779584. The cubic root of 155474534 is about 537.7161592456.

The spelling of 155474534 in words is "one hundred fifty-five million, four hundred seventy-four thousand, five hundred thirty-four".