155015450 has 12 divisors (see below), whose sum is σ = 288328830. Its totient is φ = 62006160.

The previous prime is 155015449. The next prime is 155015453. The reversal of 155015450 is 54510551.

155015450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 114425809 + 40589641 = 10697^2 + 6371^2 .

It is not an unprimeable number, because it can be changed into a prime (155015453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1550105 + ... + 1550204.

Almost surely, 2^155015450 is an apocalyptic number.

155015450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155015450 is a deficient number, since it is larger than the sum of its proper divisors (133313380).

155015450 is a wasteful number, since it uses less digits than its factorization.

155015450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100321 (or 3100316 counting only the distinct ones).

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

The square root of 155015450 is about 12450.5200694589. The cubic root of 155015450 is about 537.1863827593.

The spelling of 155015450 in words is "one hundred fifty-five million, fifteen thousand, four hundred fifty".