155321220452 has 12 divisors (see below), whose sum is σ = 271870260480. Its totient is φ = 77644003176.

The previous prime is 155321220391. The next prime is 155321220497. The reversal of 155321220452 is 254022123551.

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, 4130708 + ... + 4168139.

It is an arithmetic number, because the mean of its divisors is an integer number (22655855040).

Almost surely, 2^155321220452 is an apocalyptic number.

It is an amenable number.

155321220452 is a deficient number, since it is larger than the sum of its proper divisors (116549040028).

155321220452 is a wasteful number, since it uses less digits than its factorization.

155321220452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8303530 (or 8303528 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 155321220452 in words is "one hundred fifty-five billion, three hundred twenty-one million, two hundred twenty thousand, four hundred fifty-two".