1551523342402 has 12 divisors (see below), whose sum is σ = 2558090139318. Its totient is φ = 705237882800.

The previous prime is 1551523342393. The next prime is 1551523342417. The reversal of 1551523342402 is 2042433251551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1304435810161 + 247087532241 = 1142119^2 + 497079^2 .

It is a super-2 number, since 2×1551523342402² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3205626499 + ... + 3205626982.

Almost surely, 2^{1551523342402} is an apocalyptic number.

1551523342402 is a deficient number, since it is larger than the sum of its proper divisors (1006566796916).

1551523342402 is a wasteful number, since it uses less digits than its factorization.

1551523342402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411253505 (or 6411253494 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 1551523342402 its reverse (2042433251551), we get a palindrome (3593956593953).

The spelling of 1551523342402 in words is "one trillion, five hundred fifty-one billion, five hundred twenty-three million, three hundred forty-two thousand, four hundred two".