155438437 has 12 divisors (see below), whose sum is σ = 197254656. Its totient is φ = 121120440.

The previous prime is 155438401. The next prime is 155438441. The reversal of 155438437 is 734834551.

155438437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155438437 - 2¹⁵ = 155405669 is a prime.

It is a super-2 number, since 2×155438437² = 48322215394005938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155438437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155438137) 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, 143653 + ... + 144730.

It is an arithmetic number, because the mean of its divisors is an integer number (16437888).

Almost surely, 2^155438437 is an apocalyptic number.

It is an amenable number.

155438437 is a deficient number, since it is larger than the sum of its proper divisors (41816219).

155438437 is a wasteful number, since it uses less digits than its factorization.

155438437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288408 (or 288401 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 155438437 is about 12467.4952175648. The cubic root of 155438437 is about 537.6745416206.

The spelling of 155438437 in words is "one hundred fifty-five million, four hundred thirty-eight thousand, four hundred thirty-seven".