155366401 has 4 divisors (see below), whose sum is σ = 163543600. Its totient is φ = 147189204.

The previous prime is 155366371. The next prime is 155366423. The reversal of 155366401 is 104663551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155366401 - 2¹³ = 155358209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155366201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4088571 + ... + 4088608.

It is an arithmetic number, because the mean of its divisors is an integer number (40885900).

Almost surely, 2^155366401 is an apocalyptic number.

It is an amenable number.

155366401 is a deficient number, since it is larger than the sum of its proper divisors (8177199).

155366401 is an equidigital number, since it uses as much as digits as its factorization.

155366401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8177198.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 155366401 is about 12464.6059303935. The cubic root of 155366401 is about 537.5914692719.

The spelling of 155366401 in words is "one hundred fifty-five million, three hundred sixty-six thousand, four hundred one".