155351797 has 4 divisors (see below), whose sum is σ = 164490156. Its totient is φ = 146213440.

The previous prime is 155351767. The next prime is 155351803. The reversal of 155351797 is 797153551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67010596 + 88341201 = 8186^2 + 9399^2 .

It is a cyclic number.

It is not a de Polignac number, because 155351797 - 2²³ = 146963189 is a prime.

It is a super-2 number, since 2×155351797² = 48268361662258418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155351717) 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, 4569154 + ... + 4569187.

It is an arithmetic number, because the mean of its divisors is an integer number (41122539).

Almost surely, 2^155351797 is an apocalyptic number.

155351797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

155351797 is a deficient number, since it is larger than the sum of its proper divisors (9138359).

155351797 is an equidigital number, since it uses as much as digits as its factorization.

155351797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138358.

The product of its digits is 165375, while the sum is 43.

The square root of 155351797 is about 12464.0200978657. The cubic root of 155351797 is about 537.5746247209.

The spelling of 155351797 in words is "one hundred fifty-five million, three hundred fifty-one thousand, seven hundred ninety-seven".