155155415 has 4 divisors (see below), whose sum is σ = 186186504. Its totient is φ = 124124328.

The previous prime is 155155411. The next prime is 155155421. The reversal of 155155415 is 514551551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155155415 - 2² = 155155411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155155411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15515537 + ... + 15515546.

It is an arithmetic number, because the mean of its divisors is an integer number (46546626).

Almost surely, 2^155155415 is an apocalyptic number.

155155415 is a deficient number, since it is larger than the sum of its proper divisors (31031089).

155155415 is an equidigital number, since it uses as much as digits as its factorization.

155155415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31031088.

The product of its digits is 12500, while the sum is 32.

The square root of 155155415 is about 12456.1396507907. The cubic root of 155155415 is about 537.3480111094.

The spelling of 155155415 in words is "one hundred fifty-five million, one hundred fifty-five thousand, four hundred fifteen".