155040501 has 32 divisors (see below), whose sum is σ = 258766848. Its totient is φ = 80216640.

The previous prime is 155040497. The next prime is 155040503. The reversal of 155040501 is 105040551.

It is not a de Polignac number, because 155040501 - 2² = 155040497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155040503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62776 + ... + 65198.

It is an arithmetic number, because the mean of its divisors is an integer number (8086464).

Almost surely, 2^155040501 is an apocalyptic number.

155040501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155040501 is a deficient number, since it is larger than the sum of its proper divisors (103726347).

155040501 is a wasteful number, since it uses less digits than its factorization.

155040501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 155040501 is about 12451.5260510509. The cubic root of 155040501 is about 537.2153182218.

The spelling of 155040501 in words is "one hundred fifty-five million, forty thousand, five hundred one".