155400415 has 16 divisors (see below), whose sum is σ = 193754880. Its totient is φ = 119508480.

The previous prime is 155400389. The next prime is 155400433. The reversal of 155400415 is 514004551.

It is a happy number.

It is not a de Polignac number, because 155400415 - 2¹⁵ = 155367647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155400415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32722 + ... + 37168.

It is an arithmetic number, because the mean of its divisors is an integer number (12109680).

Almost surely, 2^155400415 is an apocalyptic number.

155400415 is a deficient number, since it is larger than the sum of its proper divisors (38354465).

155400415 is a wasteful number, since it uses less digits than its factorization.

155400415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 155400415 is about 12465.9702791239. The cubic root of 155400415 is about 537.6306976205.

Adding to 155400415 its reverse (514004551), we get a palindrome (669404966).

The spelling of 155400415 in words is "one hundred fifty-five million, four hundred thousand, four hundred fifteen".