155194772 has 6 divisors (see below), whose sum is σ = 271590858. Its totient is φ = 77597384.

The previous prime is 155194769. The next prime is 155194801. The reversal of 155194772 is 277491551.

It can be written as a sum of positive squares in only one way, i.e., 130553476 + 24641296 = 11426^2 + 4964^2 .

It is a super-2 number, since 2×155194772² = 48170834512263968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19399343 + ... + 19399350.

It is an arithmetic number, because the mean of its divisors is an integer number (45265143).

Almost surely, 2^155194772 is an apocalyptic number.

It is an amenable number.

155194772 is a deficient number, since it is larger than the sum of its proper divisors (116396086).

155194772 is a wasteful number, since it uses less digits than its factorization.

155194772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38798697 (or 38798695 counting only the distinct ones).

The product of its digits is 88200, while the sum is 41.

The square root of 155194772 is about 12457.7193739464. The cubic root of 155194772 is about 537.3934421541.

The spelling of 155194772 in words is "one hundred fifty-five million, one hundred ninety-four thousand, seven hundred seventy-two".