155401550 has 12 divisors (see below), whose sum is σ = 289046976. Its totient is φ = 62160600.

The previous prime is 155401549. The next prime is 155401567. The reversal of 155401550 is 55104551.

155401550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1553966 + ... + 1554065.

It is an arithmetic number, because the mean of its divisors is an integer number (24087248).

Almost surely, 2^155401550 is an apocalyptic number.

155401550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155401550 is a deficient number, since it is larger than the sum of its proper divisors (133645426).

155401550 is a wasteful number, since it uses less digits than its factorization.

155401550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108043 (or 3108038 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 155401550 is about 12466.0158029741. The cubic root of 155401550 is about 537.6320065174.

The spelling of 155401550 in words is "one hundred fifty-five million, four hundred one thousand, five hundred fifty".