155552407 has 4 divisors (see below), whose sum is σ = 155742696. Its totient is φ = 155362120.

The previous prime is 155552393. The next prime is 155552417. The reversal of 155552407 is 704255551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704255551 = 31 ⋅22717921.

It is a cyclic number.

It is not a de Polignac number, because 155552407 - 2⁷ = 155552279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155552417) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 93913 + ... + 95554.

It is an arithmetic number, because the mean of its divisors is an integer number (38935674).

Almost surely, 2^155552407 is an apocalyptic number.

155552407 is a deficient number, since it is larger than the sum of its proper divisors (190289).

155552407 is an equidigital number, since it uses as much as digits as its factorization.

155552407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190288.

The product of its (nonzero) digits is 35000, while the sum is 34.

The square root of 155552407 is about 12472.0650655776. The cubic root of 155552407 is about 537.8059201006.

The spelling of 155552407 in words is "one hundred fifty-five million, five hundred fifty-two thousand, four hundred seven".