155402801 has 2 divisors, whose sum is σ = 155402802. Its totient is φ = 155402800.

The previous prime is 155402761. The next prime is 155402857. The reversal of 155402801 is 108204551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 15808576 = 11815^2 + 3976^2 .

It is a cyclic number.

It is not a de Polignac number, because 155402801 - 2¹⁴ = 155386417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155407801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77701400 + 77701401.

It is an arithmetic number, because the mean of its divisors is an integer number (77701401).

Almost surely, 2^155402801 is an apocalyptic number.

It is an amenable number.

155402801 is a deficient number, since it is larger than the sum of its proper divisors (1).

155402801 is an equidigital number, since it uses as much as digits as its factorization.

155402801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 155402801 is about 12466.0659792895. The cubic root of 155402801 is about 537.6334491796.

The spelling of 155402801 in words is "one hundred fifty-five million, four hundred two thousand, eight hundred one".