155493154 has 4 divisors (see below), whose sum is σ = 233239734. Its totient is φ = 77746576.

The previous prime is 155493137. The next prime is 155493167. The reversal of 155493154 is 451394551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 451394551 = 73 ⋅6183487.

It can be written as a sum of positive squares in only one way, i.e., 118222129 + 37271025 = 10873^2 + 6105^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38873287 + ... + 38873290.

Almost surely, 2^155493154 is an apocalyptic number.

155493154 is a deficient number, since it is larger than the sum of its proper divisors (77746580).

155493154 is an equidigital number, since it uses as much as digits as its factorization.

155493154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77746579.

The product of its digits is 54000, while the sum is 37.

The square root of 155493154 is about 12469.6894107271. The cubic root of 155493154 is about 537.7376244441.

The spelling of 155493154 in words is "one hundred fifty-five million, four hundred ninety-three thousand, one hundred fifty-four".