155214641 has 16 divisors (see below), whose sum is σ = 171234000. Its totient is φ = 140034048.

The previous prime is 155214637. The next prime is 155214671. The reversal of 155214641 is 146412551.

It can be written as a sum of positive squares in 8 ways, for example, as 27615025 + 127599616 = 5255^2 + 11296^2 .

It is a cyclic number.

It is not a de Polignac number, because 155214641 - 2² = 155214637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155214601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72401 + ... + 74513.

It is an arithmetic number, because the mean of its divisors is an integer number (10702125).

Almost surely, 2^155214641 is an apocalyptic number.

It is an amenable number.

155214641 is a deficient number, since it is larger than the sum of its proper divisors (16019359).

155214641 is a wasteful number, since it uses less digits than its factorization.

155214641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308.

The product of its digits is 4800, while the sum is 29.

The square root of 155214641 is about 12458.5168057839. The cubic root of 155214641 is about 537.4163746591.

The spelling of 155214641 in words is "one hundred fifty-five million, two hundred fourteen thousand, six hundred forty-one".