1551401355 has 64 divisors (see below), whose sum is σ = 2937102336. Its totient is φ = 684288000.

The previous prime is 1551401353. The next prime is 1551401381. The reversal of 1551401355 is 5531041551.

It is not a de Polignac number, because 1551401355 - 2¹ = 1551401353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1551401353) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1760515 + ... + 1761395.

It is an arithmetic number, because the mean of its divisors is an integer number (45892224).

Almost surely, 2^1551401355 is an apocalyptic number.

1551401355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1551401355 is a deficient number, since it is larger than the sum of its proper divisors (1385700981).

1551401355 is a wasteful number, since it uses less digits than its factorization.

1551401355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 1551401355 is about 39387.8325755556. The cubic root of 1551401355 is about 1157.6431922021.

The spelling of 1551401355 in words is "one billion, five hundred fifty-one million, four hundred one thousand, three hundred fifty-five".