155827421 has 8 divisors (see below), whose sum is σ = 162892800. Its totient is φ = 148889520.

The previous prime is 155827337. The next prime is 155827433. The reversal of 155827421 is 124728551.

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 155827421 - 2¹⁴ = 155811037 is a prime.

It is a super-2 number, since 2×155827421² = 48564370271022482, 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 (155827471) 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, 29366 + ... + 34263.

It is an arithmetic number, because the mean of its divisors is an integer number (20361600).

Almost surely, 2^155827421 is an apocalyptic number.

It is an amenable number.

155827421 is a deficient number, since it is larger than the sum of its proper divisors (7065379).

155827421 is an equidigital number, since it uses as much as digits as its factorization.

155827421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63739.

The product of its digits is 22400, while the sum is 35.

The square root of 155827421 is about 12483.0853958467. The cubic root of 155827421 is about 538.1226773951.

The spelling of 155827421 in words is "one hundred fifty-five million, eight hundred twenty-seven thousand, four hundred twenty-one".