155272154 has 4 divisors (see below), whose sum is σ = 232908234. Its totient is φ = 77636076.

The previous prime is 155272151. The next prime is 155272189. The reversal of 155272154 is 451272551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 451272551 = 2683 ⋅168197.

It can be written as a sum of positive squares in only one way, i.e., 111408025 + 43864129 = 10555^2 + 6623^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155272154.

It is not an unprimeable number, because it can be changed into a prime (155272151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38818037 + ... + 38818040.

Almost surely, 2^155272154 is an apocalyptic number.

155272154 is a deficient number, since it is larger than the sum of its proper divisors (77636080).

155272154 is an equidigital number, since it uses as much as digits as its factorization.

155272154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77636079.

The product of its digits is 14000, while the sum is 32.

The square root of 155272154 is about 12460.8247720606. The cubic root of 155272154 is about 537.4827442811.

The spelling of 155272154 in words is "one hundred fifty-five million, two hundred seventy-two thousand, one hundred fifty-four".