155053919 has 4 divisors (see below), whose sum is σ = 156274944. Its totient is φ = 153832896.

The previous prime is 155053903. The next prime is 155053933. The reversal of 155053919 is 919350551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919350551 = 7 ⋅131335793.

It is a cyclic number.

It is not a de Polignac number, because 155053919 - 2⁴ = 155053903 is a prime.

It is a super-2 number, since 2×155053919² = 48083435594517122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155053999) 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, 610322 + ... + 610575.

It is an arithmetic number, because the mean of its divisors is an integer number (39068736).

Almost surely, 2^155053919 is an apocalyptic number.

155053919 is a deficient number, since it is larger than the sum of its proper divisors (1221025).

155053919 is a wasteful number, since it uses less digits than its factorization.

155053919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221024.

The product of its (nonzero) digits is 30375, while the sum is 38.

The square root of 155053919 is about 12452.0648488514. The cubic root of 155053919 is about 537.2308155643.

The spelling of 155053919 in words is "one hundred fifty-five million, fifty-three thousand, nine hundred nineteen".