155620427 has 8 divisors (see below), whose sum is σ = 158238432. Its totient is φ = 153014400.

The previous prime is 155620343. The next prime is 155620433. The reversal of 155620427 is 724026551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155620427 - 2¹⁸ = 155358283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155620393 and 155620402.

It is not an unprimeable number, because it can be changed into a prime (155620457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25427 + ... + 30947.

It is an arithmetic number, because the mean of its divisors is an integer number (19779804).

Almost surely, 2^155620427 is an apocalyptic number.

155620427 is a deficient number, since it is larger than the sum of its proper divisors (2618005).

155620427 is an equidigital number, since it uses as much as digits as its factorization.

155620427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5989.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 155620427 is about 12474.7916615870. The cubic root of 155620427 is about 537.8842993181.

Adding to 155620427 its reverse (724026551), we get a palindrome (879646978).

The spelling of 155620427 in words is "one hundred fifty-five million, six hundred twenty thousand, four hundred twenty-seven".