155016431 has 4 divisors (see below), whose sum is σ = 155058072. Its totient is φ = 154974792.

The previous prime is 155016427. The next prime is 155016439. The reversal of 155016431 is 134610551.

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 155016431 - 2² = 155016427 is a prime.

It is a super-2 number, since 2×155016431² = 48060187759955522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155016431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155016439) 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, 14621 + ... + 22886.

It is an arithmetic number, because the mean of its divisors is an integer number (38764518).

Almost surely, 2^155016431 is an apocalyptic number.

155016431 is a deficient number, since it is larger than the sum of its proper divisors (41641).

155016431 is an equidigital number, since it uses as much as digits as its factorization.

155016431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41640.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 155016431 is about 12450.5594653413. The cubic root of 155016431 is about 537.1875159339.

Adding to 155016431 its reverse (134610551), we get a palindrome (289626982).

It can be divided in two parts, 1550164 and 31, that multiplied together give a palindrome (48055084).

The spelling of 155016431 in words is "one hundred fifty-five million, sixteen thousand, four hundred thirty-one".