155112621 has 16 divisors (see below), whose sum is σ = 221645184. Its totient is φ = 96237504.

The previous prime is 155112563. The next prime is 155112631. The reversal of 155112621 is 126211551.

It is not a de Polignac number, because 155112621 - 2⁶ = 155112557 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155112591 and 155112600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155112631) 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, 27826 + ... + 32931.

It is an arithmetic number, because the mean of its divisors is an integer number (13852824).

Almost surely, 2^155112621 is an apocalyptic number.

It is an amenable number.

155112621 is a deficient number, since it is larger than the sum of its proper divisors (66532563).

155112621 is a wasteful number, since it uses less digits than its factorization.

155112621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60820.

The product of its digits is 600, while the sum is 24.

The square root of 155112621 is about 12454.4217449065. The cubic root of 155112621 is about 537.2986039065.

The spelling of 155112621 in words is "one hundred fifty-five million, one hundred twelve thousand, six hundred twenty-one".