155440354 has 4 divisors (see below), whose sum is σ = 233160534. Its totient is φ = 77720176.

The previous prime is 155440339. The next prime is 155440379. The reversal of 155440354 is 453044551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 453044551 = 191 ⋅2371961.

It can be written as a sum of positive squares in only one way, i.e., 154430329 + 1010025 = 12427^2 + 1005^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38860087 + ... + 38860090.

Almost surely, 2^155440354 is an apocalyptic number.

155440354 is a deficient number, since it is larger than the sum of its proper divisors (77720180).

155440354 is an equidigital number, since it uses as much as digits as its factorization.

155440354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77720179.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 155440354 is about 12467.5720972449. The cubic root of 155440354 is about 537.6767519659.

The spelling of 155440354 in words is "one hundred fifty-five million, four hundred forty thousand, three hundred fifty-four".