155021516 has 12 divisors (see below), whose sum is σ = 292156032. Its totient is φ = 71548368.

The previous prime is 155021509. The next prime is 155021561. The reversal of 155021516 is 615120551.

155021516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1490540 + ... + 1490643.

It is an arithmetic number, because the mean of its divisors is an integer number (24346336).

Almost surely, 2^155021516 is an apocalyptic number.

It is an amenable number.

155021516 is a deficient number, since it is larger than the sum of its proper divisors (137134516).

155021516 is a wasteful number, since it uses less digits than its factorization.

155021516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981200 (or 2981198 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 155021516 is about 12450.7636713577. The cubic root of 155021516 is about 537.1933896525.

The spelling of 155021516 in words is "one hundred fifty-five million, twenty-one thousand, five hundred sixteen".