155340531251 has 4 divisors (see below), whose sum is σ = 155836827192. Its totient is φ = 154844235312.

The previous prime is 155340531221. The next prime is 155340531319. The reversal of 155340531251 is 152135043551.

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 155340531251 - 2¹⁸ = 155340269107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155340531211) 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, 248147501 + ... + 248148126.

It is an arithmetic number, because the mean of its divisors is an integer number (38959206798).

Almost surely, 2^155340531251 is an apocalyptic number.

155340531251 is a deficient number, since it is larger than the sum of its proper divisors (496295941).

155340531251 is an equidigital number, since it uses as much as digits as its factorization.

155340531251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496295940.

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 155340531251 in words is "one hundred fifty-five billion, three hundred forty million, five hundred thirty-one thousand, two hundred fifty-one".