155274131 has 4 divisors (see below), whose sum is σ = 155918664. Its totient is φ = 154629600.

The previous prime is 155274121. The next prime is 155274143. The reversal of 155274131 is 131472551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131472551 = 7 ⋅18781793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155274131 is a prime.

It is a super-2 number, since 2×155274131² = 48220111515610322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155274094 and 155274103.

It is not an unprimeable number, because it can be changed into a prime (155274101) 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, 321905 + ... + 322386.

It is an arithmetic number, because the mean of its divisors is an integer number (38979666).

Almost surely, 2^155274131 is an apocalyptic number.

155274131 is a deficient number, since it is larger than the sum of its proper divisors (644533).

155274131 is an equidigital number, since it uses as much as digits as its factorization.

155274131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644532.

The product of its digits is 4200, while the sum is 29.

The square root of 155274131 is about 12460.9041004255. The cubic root of 155274131 is about 537.4850254346.

The spelling of 155274131 in words is "one hundred fifty-five million, two hundred seventy-four thousand, one hundred thirty-one".