155446431 has 16 divisors (see below), whose sum is σ = 244512768. Its totient is φ = 85960800.

The previous prime is 155446411. The next prime is 155446441. The reversal of 155446431 is 134644551.

It is not a de Polignac number, because 155446431 - 2⁵ = 155446399 is a prime.

It is a super-2 number, since 2×155446431² = 48327185821275522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155446392 and 155446401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155446411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118740 + ... + 120041.

It is an arithmetic number, because the mean of its divisors is an integer number (15282048).

Almost surely, 2^155446431 is an apocalyptic number.

155446431 is a deficient number, since it is larger than the sum of its proper divisors (89066337).

155446431 is a wasteful number, since it uses less digits than its factorization.

155446431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238822.

The product of its digits is 28800, while the sum is 33.

The square root of 155446431 is about 12467.8158071091. The cubic root of 155446431 is about 537.6837587672.

The spelling of 155446431 in words is "one hundred fifty-five million, four hundred forty-six thousand, four hundred thirty-one".