155374144531 has 2 divisors, whose sum is σ = 155374144532. Its totient is φ = 155374144530.

The previous prime is 155374144493. The next prime is 155374144559. The reversal of 155374144531 is 135441473551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155374144531 - 2³⁷ = 17935191059 is a prime.

It is a super-2 number, since 2×155374144531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155374144031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77687072265 + 77687072266.

It is an arithmetic number, because the mean of its divisors is an integer number (77687072266).

Almost surely, 2^155374144531 is an apocalyptic number.

155374144531 is a deficient number, since it is larger than the sum of its proper divisors (1).

155374144531 is an equidigital number, since it uses as much as digits as its factorization.

155374144531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 43.

The spelling of 155374144531 in words is "one hundred fifty-five billion, three hundred seventy-four million, one hundred forty-four thousand, five hundred thirty-one".