155312201 has 8 divisors (see below), whose sum is σ = 174897408. Its totient is φ = 136638000.

The previous prime is 155312191. The next prime is 155312203. The reversal of 155312201 is 102213551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155312201 - 2¹⁴ = 155295817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155312203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227390 + ... + 228071.

It is an arithmetic number, because the mean of its divisors is an integer number (21862176).

Almost surely, 2^155312201 is an apocalyptic number.

155312201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155312201 is a deficient number, since it is larger than the sum of its proper divisors (19585207).

155312201 is a wasteful number, since it uses less digits than its factorization.

155312201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455503.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 155312201 is about 12462.4315845665. The cubic root of 155312201 is about 537.5289485761.

Adding to 155312201 its reverse (102213551), we get a palindrome (257525752).

The spelling of 155312201 in words is "one hundred fifty-five million, three hundred twelve thousand, two hundred one".