155155401 has 12 divisors (see below), whose sum is σ = 233857728. Its totient is φ = 98939544.

The previous prime is 155155313. The next prime is 155155409. The reversal of 155155401 is 104551551.

It is not a de Polignac number, because 155155401 - 2⁹ = 155154889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155155409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 374565 + ... + 374978.

It is an arithmetic number, because the mean of its divisors is an integer number (19488144).

Almost surely, 2^155155401 is an apocalyptic number.

It is an amenable number.

155155401 is a deficient number, since it is larger than the sum of its proper divisors (78702327).

155155401 is a wasteful number, since it uses less digits than its factorization.

155155401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749572 (or 749569 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 155155401 is about 12456.1390888188. The cubic root of 155155401 is about 537.3479949474.

The spelling of 155155401 in words is "one hundred fifty-five million, one hundred fifty-five thousand, four hundred one".