155401555222 has 8 divisors (see below), whose sum is σ = 241140344400. Its totient is φ = 75021440424.

The previous prime is 155401555187. The next prime is 155401555241. The reversal of 155401555222 is 222555104551.

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

It is a congruent number.

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, 1339668522 + ... + 1339668637.

It is an arithmetic number, because the mean of its divisors is an integer number (30142543050).

Almost surely, 2^155401555222 is an apocalyptic number.

155401555222 is a deficient number, since it is larger than the sum of its proper divisors (85738789178).

155401555222 is a wasteful number, since it uses less digits than its factorization.

155401555222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679337190.

The product of its (nonzero) digits is 100000, while the sum is 37.

Adding to 155401555222 its reverse (222555104551), we get a palindrome (377956659773).

The spelling of 155401555222 in words is "one hundred fifty-five billion, four hundred one million, five hundred fifty-five thousand, two hundred twenty-two".