155140481 has 4 divisors (see below), whose sum is σ = 155287764. Its totient is φ = 154993200.

The previous prime is 155140471. The next prime is 155140501. The reversal of 155140481 is 184041551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103530625 + 51609856 = 10175^2 + 7184^2 .

It is a cyclic number.

It is not a de Polignac number, because 155140481 - 2⁶ = 155140417 is a prime.

It is a super-2 number, since 2×155140481² = 48137137689822722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155140471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72050 + ... + 74171.

It is an arithmetic number, because the mean of its divisors is an integer number (38821941).

Almost surely, 2^155140481 is an apocalyptic number.

It is an amenable number.

155140481 is a deficient number, since it is larger than the sum of its proper divisors (147283).

155140481 is a wasteful number, since it uses less digits than its factorization.

155140481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147282.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 155140481 is about 12455.5401729512. The cubic root of 155140481 is about 537.3307703046.

The spelling of 155140481 in words is "one hundred fifty-five million, one hundred forty thousand, four hundred eighty-one".