155051131901 has 2 divisors, whose sum is σ = 155051131902. Its totient is φ = 155051131900.

The previous prime is 155051131871. The next prime is 155051131951. The reversal of 155051131901 is 109131150551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150349287001 + 4701844900 = 387749^2 + 68570^2 .

It is a cyclic number.

It is not a de Polignac number, because 155051131901 - 2¹⁴ = 155051115517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155051131951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77525565950 + 77525565951.

It is an arithmetic number, because the mean of its divisors is an integer number (77525565951).

Almost surely, 2^155051131901 is an apocalyptic number.

It is an amenable number.

155051131901 is a deficient number, since it is larger than the sum of its proper divisors (1).

155051131901 is an equidigital number, since it uses as much as digits as its factorization.

155051131901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 32.

The spelling of 155051131901 in words is "one hundred fifty-five billion, fifty-one million, one hundred thirty-one thousand, nine hundred one".