155272572 has 288 divisors, whose sum is σ = 526424640. Its totient is φ = 39191040.

The previous prime is 155272561. The next prime is 155272639. The reversal of 155272572 is 275272551.

155272572 is a `hidden beast` number, since 15 + 5 + 2 + 72 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2545422 + ... + 2545482.

Almost surely, 2^155272572 is an apocalyptic number.

155272572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155272572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263212320).

155272572 is an abundant number, since it is smaller than the sum of its proper divisors (371152068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155272572 is a wasteful number, since it uses less digits than its factorization.

155272572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 123 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 155272572 is about 12460.8415446149. The cubic root of 155272572 is about 537.4832265903.

The spelling of 155272572 in words is "one hundred fifty-five million, two hundred seventy-two thousand, five hundred seventy-two".